TRENWICK GROUP INC
10-K/A, 2000-08-22
FIRE, MARINE & CASUALTY INSURANCE
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 10-K/A
(Mark One)
|X| ANNUAL REPORT  PURSUANT TO  SECTION 13 OR 15(d) OF THE  SECURITIES  EXCHANGE
    ACT OF 1934 [FEE REQUIRED] For the fiscal year ended December 31, 1999.
                                       OR

| | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934 [NO FEE REQUIRED]
    For the transition period                        to
                               ----------------------    ----------------------

                         Commission file number 1-15389

                               TRENWICK GROUP INC.
             (Exact name of registrant as specified in its charter)

        Delaware                                                06-1152790
(State or other jurisdiction of                             (I.R.S. Employer
 incorporation or organization)                              Identification No.)

         One Canterbury Green, Stamford, Connecticut                06901
           (Address of principal executive offices)              (Zip Code)

       Registrant's telephone number, including area code: (203) 353-5500

           Securities registered pursuant to Section 12(b) of the Act:

  Title of Each Class                             Name of Each Exchange on Which
                                                             Registered
Common Stock, par value $.10 per share                New York Stock Exchange
   Preferred Stock Purchase Rights                    New York Stock Exchange

        Securities registered pursuant to Section 12(g) of the Act: None

     Indicate  by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.
Yes |X|   No |_|

     Indicate by check mark if disclosure of delinquent  filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. |_|

     The  aggregate  market  value on March 24, 2000 of the voting stock held by
non-affiliates of the registrant was $224,696,190.

     The number of shares  outstanding of each of the issuer's classes of common
stock as of the close of the period covered by this report:

      Class                                        Outstanding at March 24, 2000
      -----                                        -----------------------------
Common Stock, $.10 par value                                  16,295,207

Certain portions of the registrant's  definitive proxy statement relating to its
annual  meeting  of  stockholders  scheduled  to be  held on May  18,  2000  are
incorporated  by reference into Part III of this report and certain  portions of
the  registrant's  annual report to stockholders  are  incorporated by reference
into Parts II and IV of this report.


<PAGE>


                         AMENDMENT NO. 1 ON FORM 10-K/A
                                     TO THE
         ANNUAL REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 1999

This  Amendment  No. 1 on Form  10-K/A  is  being  filed to  correct  a  printer
transmission error in the tables listing gross premiums written and net premiums
written on page 2, to include  additional  disclosure in the second paragraph on
page 12, to revise the  classification  of certain assets and related cash flows
in  the  1999  column  in  Schedule  II -  Condensed  Financial  Information  of
Registrant  on  pages  S-1  and  S-3,  to  amend  the  presentation  of  certain
information  in Schedule V - Valuation and  Qualifying  Accounts on page S-5, to
revise the Report of Independent Accountants on Financial Statement Schedules on
page S-6 and to revise certain portions of management's  discussion and analysis
and footnotes to the financial  statements to clarify certain  disclosures.  The
revised  portions of the Annual  Report on Form 10-K are set forth in Attachment
A.



<PAGE>


                                   SIGNATURES

Pursuant to the  Requirements of Section 13 or 15(d) of Securities  Exchange Act
of 1934,  the  registrant has duly caused this Amendment No. 1 on Form 10-K/A to
be signed on its behalf by the undersigned, thereunto duly authorized.

                                                 TRENWICK GROUP INC.
                                                    (Registrant)


                                            By   /s/ James F. Billett, Jr.
                                                 ------------------------------
                                                 James F. Billett, Jr.
                                                 Chairman, President and
                                                 Chief Executive Officer
Dated:  August 22, 2000




<PAGE>


                                  Attachment A

                                     PART I
Item 1.  Business

General Background and History

Trenwick  Group  Inc.   ("Trenwick")  is  a  specialty  insurance   underwriting
organization with multiple  distribution  platforms in insurance and reinsurance
operating  through its subsidiaries  located in the United States and the United
Kingdom.   Trenwick's  four  principal  operating  units  are  Trenwick  America
Reinsurance   Corporation   ("Trenwick   America  Re"),  which  provides  treaty
reinsurance  to insurers of property  and casualty  risks in the United  States;
Trenwick  International  Limited ("Trenwick  International"),  which underwrites
treaty and facultative reinsurance as well as specialty insurance on a worldwide
basis;   Chartwell  Managing  Agents  Limited  ("Chartwell   Managing  Agents"),
Trenwick's  managing  agency at Lloyd's;  and  Canterbury  Financial  Group Inc.
("Canterbury Financial"), which underwrites U.S. property and casualty insurance
through specialty program administrators.

Trenwick was incorporated in the State of Delaware in 1985. Trenwick America Re,
a  Connecticut  corporation,  operated  as  a  subsidiary  of  Trenwick  America
Corporation  from 1983  through  1985 and was  acquired by Trenwick in 1985 as a
result of a corporate restructuring. Trenwick acquired Trenwick International in
February 1998 and  Chartwell Re  Corporation  ("Chartwell")  in October 1999. In
connection  with the  acquisition  of  Chartwell,  Trenwick  acquired  Chartwell
Managing Agents, Chartwell Reinsurance Company ("Chartwell Reinsurance"),  whose
reinsurance  business  was  assumed by Trenwick  America  Re, and The  Insurance
Corporation  of New York  ("INSCORP")  and Dakota  Specialty  Insurance  Company
("Dakota"),  both of which are operating companies for Canterbury Financial.  In
addition, Trenwick owns several inactive Bermuda subsidiaries.

On December 19, 1999,  Trenwick  announced that it had entered into a definitive
agreement to combine with LaSalle Re Holdings Limited, with shareholders of each
company to receive shares in a new Bermuda  holding company to be named Trenwick
Group Ltd. This transaction is expected to be completed in the second quarter of
2000.

Each of  Trenwick's  operating  insurance  company  subsidiaries  is  rated  "A"
(Excellent) by A.M. Best Company and has been assigned an A+ financial  strength
rating by Standard & Poor's.  All of Chartwell Managing Agents' syndicates enjoy
the benefit of the ratings of Lloyd's,  which is rated "A"  (Excellent)  by A.M.
Best Company and has an A+ claims paying  ability rating from Standard & Poor's.
These  ratings  are  based  upon  factors  that may be of  concern  to policy or
contract  holders,   agents  and   intermediaries,   but  may  not  reflect  the
considerations  applicable to an equity investment in a reinsurance or insurance
company.  A change in any such  rating is at the  discretion  of the  respective
rating agencies.

Trenwick's  gross and net  premium  writings  for its  operational  units are as
follows:




                                       1

<PAGE>



                                        1999             1998           1997
                                  ---------------  ---------------  ------------
Gross Premiums Written
     Trenwick America Re          $   210,921(1)    $   218,249     $   248,662
     Trenwick International           171,698           105,114(2)            -
     Chartwell Managing Agents         84,834(3)              -               -
     Canterbury Financial              38,088(4)              -               -
                                  ---------------  ---------------  ------------
     Total                        $   505,541      $    323,363     $   248,662
                                  ===============  ===============  ============

Net Premiums Written
     Trenwick America Re          $    155,108(1)  $    169,112     $   195,230
     Trenwick International            129,399           81,107(2)            -
     Chartwell Managing Agents          64,462(3)             -               -
     Canterbury Financial                5,641(4)             -               -
                                  ---------------  ---------------  ------------
     Total                        $    354,610     $    250,219     $   195,230
                                  ===============  ===============  ============

(1) Includes reinsurance business of Chartwell Reinsurance  and its subsidiaries
    since its acquisition on October 27, 1999.
(2) Includes Trenwick International business  since its  acquisition on February
    27, 1998.
(3) Includes Chartwell Managing Agents business since its acquisition on October
    27, 1999.
(4) Includes Canterbury Financial business since its  acquisition on October 27,
    1999.

Trenwick America Reinsurance Corporation

Trenwick  America Re,  which  comprised  44% of  Trenwick's  total net  premiums
written in 1999,  underwrites United States treaty  reinsurance,  which accounts
for the  majority  of its  business,  as well as a small  amount of  facultative
reinsurance.  In this section,  Trenwick  America Re's 1999 results  include the
reinsurance  business of Chartwell  Reinsurance and its  subsidiaries  since its
acquisition on October 27, 1999.

Trenwick  America Re generally  obtains all of its business  through brokers and
reinsurance  intermediaries  which seek its  participation on reinsurance  being
placed for their  customers.  In underwriting  reinsurance,  Trenwick America Re
does not target types of clients,  classes of business or types of  reinsurance.
Rather,  it selects  transactions  based upon the quality of the reinsured,  the
attractiveness of the reinsured's  insurance rates and policy conditions and the
adequacy of the proposed reinsurance terms.

Trenwick America Re's commitment is currently limited to $2,500,000 per contract
on  casualty  treaty  business  and  $1,500,000  on  property  business.  Larger
commitments are subject to Trenwick's Underwriting Committee referral process.






                                       2

<PAGE>



Trenwick  America Re's net premiums written by line of business are set forth in
the following table for the periods indicated.

                    Trenwick America Reinsurance Corporation
                    Net Premiums Written By Lines of Business
                                 (in thousands)

                                           1999(1)          1998           1997
                                   ----------------  --------------  -----------
Casualty
         Automobile Liability            $  17,831      $  51,299      $  50,187
         Errors and Omissions               45,557         36,655         40,063
         General Liability                  22,170         17,743         20,795
         Accident and Health                17,922         11,014          6,326
         Medical Malpractice                 3,422          7,700         10,293
         Workers' Compensation               8,297          3,025         18,328
         Products Liability                  1,834          2,312          1,743
         Other Casualty                     12,431          2,697          9,133
                                   ----------------  --------------  -----------
                  Total Casualty           129,464        132,445        156,868
                                   ----------------  --------------  -----------
Property                                    25,644         36,667         38,362
                                   ----------------  --------------  -----------
         Total                           $ 155,108      $ 169,112      $ 195,230
                                   ================  ==============  ===========

(1)Includes  reinsurance business of Chartwell  Reinsurance and its subsidiaries
since its acquisition on October 27, 1999.

The major lines of  reinsurance  currently  written by  Trenwick  America Re are
automobile liability,  errors and omissions,  general liability and accident and
health. Together these lines account for an aggregate of at least 67% of its net
premiums  written in all years  indicated.  The overall  decline in net premiums
written  since 1997 is a result of three  principal  causes.  Competition  among
primary  companies  has caused  cedants to reduce their own premium  writings or
restructure their reinsurance programs,  reducing the amount of reinsurance they
purchase.  As a  result  of  consolidation  within  the  industry,  many  ceding
companies are now larger and financially stronger,  enabling them to retain more
risk. In addition,  increasingly  intense competition in the reinsurance markets
has driven reinsurance prices on a number of accounts below pricing levels which
Trenwick  America Re will accept.  The 65% decline in  automobile  liability net
premium  writings  in 1999  resulted  from the  non-renewal  of two  significant
accounts,  one of which was commuted in the fourth quarter of 1999. Accident and
health net  premiums  written  increased  by 63% compared to 1998 as a result of
Trenwick  America Re's strategic  alliance with Duncanson and Holt. This account
was  non-renewed  in 2000 following the sale of Duncanson and Holt. In 1999, the
amount of property business,  including automobile physical damage, underwritten
by Trenwick  America Re remained  constant as a percentage  of total net written
premiums.

Three ceding companies accounted for approximately 25%, 38%, and 32% of Trenwick
America Re's gross premiums written in 1999, 1998 and 1997, respectively. During
1999,  Duncanson  and  Holt,  American  International  Group  and CNA  Insurance
Companies accounted for 11%, 7% and 7%,  respectively,  of Trenwick America Re's
gross  premiums  written.  While  Trenwick  America Re believes that the loss of
these  accounts  will not have a material  adverse  effect on the  business  and
operations of Trenwick,  Trenwick does not believe that such a loss would have a
long-term adverse effect because of Trenwick's  competitive  position within the
reinsurance  market and the  availability  of  business  from other  brokers and
ceding companies. Further, Trenwick believes that it will continue to underwrite
new business to replace the accounts.

                                       3

<PAGE>

Trenwick International Limited

Trenwick  International's  business, which accounted for 36% of Trenwick's total
net premiums written in 1999, consists  principally of insurance and facultative
reinsurance  of  specialty  classes.  Trenwick  International  also  underwrites
property and casualty treaty  reinsurance.  In the latter part of 1998, Trenwick
International  opened a branch office in Paris which  specializes in facultative
reinsurance of large,  technically  complex property risks.  Premiums written by
the Paris branch in 1999 were not material.

Trenwick  International  also  obtains  all of  its  business  through  brokers.
Trenwick  International's  business  consists of  Specialist  Risk  Underwriting
("SRU") which includes  direct  insurance,  facultative  reinsurance  and treaty
reinsurance.  The following table reflects Trenwick International's net premiums
written by type of business for 1999 and 1998.

             International Net Premiums Written By Type of Business
                             (dollars in thousands)

                              1999                           1998
                  ------------------------------  ----------------------------
SRU                       98,926       76       %       83,397       83      %
Treaty                    30,473       24       %       17,385       17      %
                  --------------   ------------  --------------    -----------
Total                  $ 129,399      100       %      100,782      100      %
                  ==============   ============  ==============    ===========

Specialist Risk Underwriting

SRU underwrites  business in both London and Paris.  Trenwick's branch office in
Paris  was  opened  in  September  of 1998.  The  principal  lines  of  business
underwritten in 1999 and 1998 include property, engineering, accident and health
professional indemnity, financial institutions, liability, extended warranty and
yacht hull. In 1999,  approximately 53% of Trenwick International's net premiums
were written directly as insurance.

Trenwick's  Paris  branch  specializes  in large,  complex  property  risks that
require  a  high  degree  of  underwriting  expertise.   Trenwick  International
generally   underwrites  this  business,   which  includes  large  manufacturing
facilities,  construction  projects as well as both onshore and offshore  energy
risks, as facultative reinsurance, but can also function directly as an insurer.
The Paris branch benefits from a pool of  underwriters  trained as engineers and
has emerged as a center for this type of technical underwriting.

Treaty

Trenwick  International's  treaty business includes  liability  business,  which
accounted for  approximately 51% of treaty business in 1999, as well as property
and  credit   business.   Treaty  is  written   both  on  a   proportional   and
non-proportional basis.


                                       4

<PAGE>



Chartwell Managing Agents

Trenwick  participates in the Lloyd's market through Chartwell  Managing Agents,
which is a managing agent at Lloyd's and through four Lloyd's corporate members.
Chartwell Managing Agents receives fees and profit commissions in respect of the
underwriting and administrative services it provides to the Lloyd's underwriting
syndicates  that it manages.  For the 2000 year of account,  Chartwell  Managing
Agents  manages  three  syndicates  with  a  total   underwriting   capacity  of
approximately  $377.1 million. In 1998 and 1999,  Chartwell Managing Agents sold
to third parties the rights to manage  syndicates 866 (motor),  947 (non-marine)
and 994  (non-marine)  and combined into a single syndicate for the 2000 year of
account the remaining  non-life  syndicates.  Trenwick  retains the benefits and
obligations with respect to its Lloyd's corporate member participation interests
in those syndicates for the open years of account at the time of the sale.

Trenwick's  Lloyd's corporate members  participated on three Lloyd's  syndicates
for the 2000 year of account,  providing an aggregate  of  approximately  $350.1
million of capacity to those syndicates. Approximately 93% of Chartwell Managing
Agents syndicates' 2000 year of account capacity was supplied by Trenwick.

Classes of business  covered by Chartwell  Managing Agents'  syndicates  include
marine, non-marine property, non-marine liability, motor, aviation and life. The
table set forth below shows the gross premiums  written for  Trenwick's  Lloyd's
corporate members for the periods indicated.  All amounts in the table below are
presented in  accordance  with U.S.  generally  accepted  accounting  principles
("GAAP").

                                   Trenwick's Lloyd's Corporate Members
                             Gross Premiums Written by Lloyd's Market Segment
                                        (dollars in thousands)(1)
                                             Year Ended December 31,
                                  ----------------------------------------------
                                     1999                          1998
                                  -----------------------   --------------------
                                   Amount    % of Total      Amount   % of Total
                                  ----------  -----------   ---------- ---------
Motor........................      $ 37,370       17.7%      $ 36,212      49.9%
Non-Marine...................       140,337       66.5         31,121      42.9
Aviation.....................        19,802        9.4          3,194       4.4
Marine.......................        12,350        5.9          1,757       2.4
Life.........................         1,092         .5            289       0.4
                                  ----------  -----------   ---------- ---------
Total........................     $ 210,951      100.0 %     $ 72,573     100.0%
                                  ==========  ===========   ========== =========

(1)  Business at Lloyd's is  conducted in pounds  sterling.  The dollar  amounts
shown here have been converted from pounds sterling at the average exchange rate
for each of the years  presented.  Data shown for 1998 and that  portion of 1999
prior to October 27, 1999 is not  included in  Trenwick's  financial  statements
because  Trenwick  acquired  Chartwell  Managing  Agents and its related Lloyd's
corporate members on October 27, 1999.

Canterbury Financial Group

Canterbury   Financial  Group  develops  insurance  programs  through  specialty
production sources with a focus on a specific line or lines of business,  with a
limited geographic emphasis, and where the program administrator's  compensation
is  adjusted  based on the  underwriting  results  of the  business.  Canterbury
Financial Group evaluates each business relationship based upon the underwriting
experience  and  operational  expertise  of the  production  source.  Canterbury
Financial  Group  periodically  performs  underwriting,  claims and  operational
audits of each of its production sources.

Canterbury  Financial  Group's gross written premiums grew 32.7%, 4.3% and 81.3%
for the years ended  December 31, 1999,  1998 and 1997,  respectively,  over the
prior year.  The  increases  in premium  reflect  the  geographic  expansion  of
existing  programs as well as the development of new programs during the periods
shown.

                                       5
<PAGE>


The table set forth  below  shows the  gross  premiums  written  for  Canterbury
Financial Group for the periods indicated:
<TABLE>
<CAPTION>

                                               Canterbury Financial Group
                                       Gross Premiums Written by Line of Business
                                               (dollars in thousands)(1)
                                                              Year Ended December 31,
                                -------------------------------------------------------------------------------
                                          1999                         1998                         1997
                                ------------------------   -------------------------   ------------------------
                                   Amount       Total        Amount        Total          Amount      Total
                                -----------  -----------   -----------  -----------    -----------  -----------
<S>                            <C>            <C>          <C>            <C>          <C>            <C>

Commercial Multiple Peril......$  41,909       28.4%       $  45,737        41.2%      $  48,404       45.4 %
General Liability..............   36,743       25.0           31,575        28.4          30,418       28.6
Automobile.....................   46,471       31.5           23,354        21.0          22,267       20.9
Workers Compensation...........   12,589        8.5            4,224         3.8           4,169        3.9
Homeowners and Other...........    9,786        6.6            6,241         5.6           1,285        1.2
                               ------------  -----------   -----------  -----------    -----------  -----------
Total..........................$ 147,498      100.0%       $ 111,131      100.0%       $ 106,543      100.0 %
                               ============  ===========   ===========  ===========    ===========  ===========
</TABLE>

(1) Data shown for 1998 and that  portion of 1999 prior to October  27,  1999 is
not  included in  Trenwick's  financial  statements  because  Trenwick  acquired
Canterbury Financial on October 27, 1999.

During the year ended December 31, 1999,  Canterbury  Financial Group underwrote
approximately  64% of its gross premiums  through three managing general agents,
of which Florida Intracoastal  Underwriters accounted for approximately 31%, HDR
Insurance Services accounted for approximately 22% and Inter-Reco  accounted for
approximately  11%. No other managing  general agent accounted for more than 10%
of  Canterbury  Financial  Group's  gross  insurance  premiums  written for such
period.

In order to reduce the potential  adverse effect arising from the termination of
any specific business relationship, Canterbury Financial Group continues to seek
to establish and develop  relationships  with a large number of managing general
agents.  While  management  believes  that its  relationships  with its managing
general agents are satisfactory,  the termination of all or a substantial number
of these  relationships could have a material adverse effect on the business and
operations of Canterbury Financial Group.

Marketing

Trenwick  generally  obtains its  business  through  insurance  and  reinsurance
brokers which represent the ceding company and clients in  negotiations  for the
purchase  of  insurance  or  reinsurance.  The  process of  effecting a brokered
placement  typically begins when a client or ceding company enlists the aid of a
broker in  structuring an insurance or  reinsurance  program.  Often the various
parties will consult  with one or more lead  underwriters  as to the pricing and
contract terms of the protection being sought. Once the terms quoted by the lead
underwriter have been approved, the broker will offer participation to qualified
insurers or reinsurers  until the program is fully subscribed at terms agreed to
by all parties.

                                       6
<PAGE>


Trenwick pays such intermediaries or brokers commissions representing negotiated
percentages  of the  premium it writes.  These  commissions  constitute  part of
Trenwick's  total  acquisition  costs  and  are  included  in  its  underwriting
expenses.  Brokers do not have the  authority to bind  Trenwick  America Re with
respect  to   agreements.   Under  certain   limited   circumstances,   selected
administrators  have the  authority to bind  Trenwick  International,  Chartwell
Managing Agents and Canterbury  Financial Group business.  These  administrators
are subject to periodic  financial and  operational  reviews.  Trenwick does not
commit in advance to accept any portion of the business  that brokers  submit to
it. Business from any company,  whether new or renewal, is subject to acceptance
by Trenwick.

During 1999, three reinsurance  brokers,  AON Reinsurance  Agency, Guy Carpenter
and E. W. Blanch  generated 37%, 16% and 8%,  respectively,  of Trenwick America
Re's gross written premiums.  These brokers are among the ten largest brokers in
the insurance and reinsurance industry.  Loss of all or a substantial portion of
the business provided by Trenwick's brokers could have a material adverse effect
on the business and operations of Trenwick.  Trenwick does not believe, however,
that the loss of such business would have a long-term  adverse effect because of
Trenwick's  competitive  position  within the broker  insurance and  reinsurance
market and the availability of business from other brokers.

Underwriting

Trenwick's  underwriting  philosophy  emphasizes  a  transactional  approach  to
underwriting  in which any insurance or reinsurance  transaction for any line of
property or casualty business is considered on its own merits. The underwriter's
primary  objective is to assess the potential for an  underwriting  profit.  The
risk  assessment  process  undertaken  by  Trenwick's  underwriters  involves  a
comprehensive  analysis of historical  data,  when  available,  and estimates of
future value of loss costs which may not be evident in the historical  data. The
factors  which  Trenwick  considers  include  the type of risk,  details  of the
underlying  insurance  coverage  provided,  adequacy of pricing using  actuarial
analysis and the terms and conditions.  With respect to its domestic  operations
which comprises fewer but  significantly  larger accounts,  Trenwick  frequently
conducts  underwriting  and claims  audits of ceding  companies  to assist it in
evaluating the information submitted by the ceding companies, before agreeing to
participate in a reinsurance transaction.

Trenwick has established formal  underwriting policy standards for both domestic
and  international  operations.  This process  involves  pre-binding  reviews of
individual material transactions by its senior underwriting staff.  Underwriting
policies  for  insurance  and  reinsurance   transactions  are  supplemented  by
conducting  periodic internal audits of each  underwriting  department to ensure
compliance with underwriting policies and procedures.

Competition

Trenwick competes with numerous major  international and domestic  insurance and
reinsurance  companies.  These  competitors,  many of which  have  substantially
greater  financial  and  staff  resources  than  Trenwick,  include  independent
insurance and reinsurance  companies,  subsidiaries or affiliates of established
insurance  companies,  reinsurance  departments of certain commercial  insurance
companies and underwriting syndicates.

Competition in the types of business which Trenwick underwrites is based on many
factors.  These factors include the perceived overall financial  strength of the
insurer or reinsurer, rates charged, other terms and conditions,  agency ratings
(including A.M. Best Company and Standard & Poor's),  service offered,  speed of
service   (including  claims  payment)  and  perceived   technical  ability  and
experience  of  staff.  The  number  of  jurisdictions  in which an  insurer  or
reinsurer is licensed or authorized to do business is also a factor.


                                       7
<PAGE>

The  financial  security of insurers and  reinsurers  has emerged as a key issue
throughout the 1990's.  To be accepted by clients,  and by ceding  companies and
their  brokers,  insurers  and  reinsurers  must  demonstrate  higher  levels of
financial security and solvency than were previously required. Transactions tend
to  have  fewer  and  larger  participants,  which  may  negatively  affect  the
availability of underwriting opportunities for Trenwick.

Trenwick's  management  believes that the insurance  and  reinsurance  industry,
including the broker market, will continue to undergo further  consolidation and
that size and  financial  strength will  continue to be  significant  factors in
effective competition.


Claims Administration

Claims   are   managed   by   Trenwick's   professional   claims   staff   whose
responsibilities  include the review of initial loss reports,  creation of claim
files, determination of whether further investigation is required, establishment
and adjustment of case reserves and payment of claims.  In addition,  the claims
staff conducts  comprehensive  claims audits of both specific claims and overall
claims  procedures at the offices of selected brokers and ceding  companies.  In
certain instances, a claims audit may be performed prior to assuming reinsurance
business as part of a  comprehensive  risk  evaluation  process.  For  insurance
business, Trenwick's claim staff uses their own judgement as well as advice from
lawyers and loss adjusters where appropriate.

In  connection  with  the  acquisition  of  Chartwell,   Trenwick   acquired  an
environmental  claims unit to evaluate the complex  toxic tort and latent injury
claims resident in one of Chartwell's subsidiaries, The Insurance Corporation of
New York.

Unpaid Claims and Claims Expenses

General

Insurers  and  reinsurers   establish   claims  and  claims   expense   reserves
representing  estimates  of future  amounts  needed to pay  claims  and  related
expenses with respect to insured events which have  occurred.  Claims and claims
expense  reserves have two  components:  case  reserves,  which are reserves for
reported  claims,  and incurred but not reported  ("IBNR")  reserves,  which are
reserves  for claims not yet  reported.  Significant  periods of time may elapse
between the occurrence of an insured  claim,  the reporting of the claims to the
insurer  and the  subsequent  reporting  of the  claims  to the  reinsurer,  the
insurer's payment of that claim, and later payments by the reinsurer.

Trenwick  first  establishes  its case  reserves  for  reported  claims  when it
receives notice of the claim. It is Trenwick's policy to establish  reserves for
reported claims in an amount equal to the greater of the reserve  recommended by
the ceding  company or the claim as estimated by  Trenwick's  claims  personnel.
Trenwick  periodically  conducts  investigations  to  determine  if  the  amount
reserved by the ceding company is appropriate or should be adjusted.  During the
claim  settlement  period,  which may be many years,  additional facts regarding
individual  claims may become known. As Trenwick learns additional facts, it may
become necessary to refine and adjust upward or downward the estimated  reserves
on a claim,  and even then the  ultimate net reserve may be less than or greater
than the revised  estimates.  Trenwick does not discount any of its reserves for
reported  or  unreported  claims  in any line of its  business  for  anticipated
investment income.

                                       8
<PAGE>

Actuarial Methods

Trenwick  utilizes  the two most common  methods of  actuarial  evaluation  used
within the  insurance  industry,  the  Bornhuetter-Ferguson  method and the loss
development method. The Bornhuetter-Ferguson  method involves the application of
selected loss ratios to  Trenwick's  earned  premiums to determine  estimates of
ultimate expected loss and loss adjustment  expenses for each underwriting year.
Multiplying  expected losses by  underwriting  year by a selected loss reporting
pattern gives an estimate of reported and unreported IBNR losses.  When the IBNR
is added to the loss and loss adjustment  expense amounts with respect to claims
that have been  reported to date, an estimated  ultimate  expected loss results.
This method  provides a more stable estimate of IBNR that is insulated from wide
variations  in  reported  losses.  In  contrast,  the  loss  development  method
extrapolates the current value of reported losses to ultimate expected losses by
using selected  reporting  patterns of losses over time. The selected  reporting
patterns are based on historical  information  (organized into loss  development
triangles) and are adjusted to reflect the changing  characteristics of the book
of business written by Trenwick.

Trenwick  provides capital to its Lloyd's corporate  members,  which support the
underwriting  capacity of the Lloyd's  syndicates  managed by Chartwell Managing
Agents. Loss reserves for this business are established using methods similar to
those  used  by  Trenwick  for its  operating  insurance  company  subsidiaries.
Chartwell  Managing  Agents has engaged Bacon & Woodrow  London Market  Services
Ltd.  ("B&W"),  an  independent  actuarial  consulting  firm, to review the loss
reserves and prepare an actuarial opinion for each of its syndicates,  including
the  actuarial  opinion  required  by  Lloyd's  solvency  regulations.  The  B&W
opinions,  which are prepared  solely for the use of Lloyd's  regulators and are
only to be relied upon by Chartwell  Managing  Agents,  assist its syndicates in
establishing appropriate reserve estimates for both the reinsurance to close and
the open years of account.

In the reserve setting process,  Trenwick includes  provisions for inflation and
"social inflation" if appropriate,  as losses are generally not determined until
some time in the future.  Trenwick continually monitors legislative activity and
evaluates  the  potential  effect  of any  legislative  changes  on its  reserve
liabilities.

Trenwick's  reserves  are  carried at the full  amount  estimated  for  ultimate
expected losses and loss adjustment  expense without any discount to reflect the
time value of money in accordance with both statutory  accounting  practices and
GAAP.  Trenwick's  actuarial department regularly performs loss reserve analyses
for its operating insurance company subsidiaries.










                                       9


<PAGE>


Reserve Analysis

The following table presents the development of Trenwick's net unpaid claims and
claims  expenses for 1989 through 1999.  The top line of the table shows the net
unpaid  claims and claims  expenses  at the  balance  sheet date for each of the
indicated  years.  This reflects the net estimated  amounts of claims and claims
expenses for claims  arising in that year and in all prior years that are unpaid
at the balance sheet date,  including  claims that had been incurred but not yet
reported to Trenwick.  The upper  portion of the table shows the net  cumulative
subsequently paid amounts as of successive years with respect to that liability.
The  middle  portion  of the  table  shows  the net  re-estimated  amount of the
previously recorded net unpaid claims and claims expenses based on experience as
of the end of each  succeeding  year. The estimates  change as more  information
becomes known about the frequency and severity of claims for individual years. A
redundancy  (deficiency)  exists  when the net  re-estimated  liability  at each
December 31 is less  (greater)  than the prior net liability  estimate.  The net
"Cumulative  Redundancy  (Deficiency)"  depicted in the table for any particular
calendar year represents the aggregate  change in the initial net estimates over
all subsequent calendar years.

The lower  portion  of the table  presents  a  reconciliation  of the net unpaid
claims  and claims  expenses  as of the end of the year with the  related  gross
unpaid  claims and  claims  expenses  as of  December  31,  1991  through  1999.
Additionally,  the table  presents a  reconciliation  of the gross  re-estimated
unpaid  claims and  claims  expenses  as of the end of the latest  re-estimation
year,  with  separate  disclosure  of  the  related   re-estimated   reinsurance
recoverable  on  unpaid  claims  and  claims  expenses.  The  "gross  cumulative
redundancy"  depicted  in the table for the  calendar  years 1991  through  1999
represents  the  aggregate  change  in the  initial  gross  estimates  over  all
subsequent calendar years.






                                       10



<PAGE>
                DEVELOPMENT OF UNPAID CLAIMS AND CLAIMS EXPENSES
                                 (in thousands)
<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------------------------------
                                           1999       1998        1997       1996        1995       1994       1993        1992
----------------------------------------------------------------------------------------------------------------------------------
<S>                                     <C>           <C>       <C>          <C>        <C>         <C>        <C>        <C>
Net unpaid claims and claims
expenses, end of year                   $1,207,436    $449,264  $ 379,351    $386,887   $327,001    $294,008   $268,091   $266,685

Cumulative amount of net
liability paid as of:
         One year later                                172,674    104,718      94,197     46,860      61,804     52,300     52,260
         Two years later                                          194,188     162,565    110,289      81,417     90,382     93,312
         Three years later                                             --     215,803    149,810     121,133     89,445    118,345
         Four years later                                              --          --    178,919     142,485    112,119    111,174
         Five years later                                              --          --         --     156,204    124,096    125,847
         Six years later                                               --          --         --          --    134,535    133,502
         Seven years later                                             --          --         --          --         --    139,779
         Eight years later                                             --          --         --          --         --         --
         Nine years later                                              --          --         --          --         --         --
         Ten years later                                               --          --         --          --         --         --

Net liability re-estimated as of:

         One year later                                463,892    372,176     381,521    322,562     291,943    267,644    255,379
         Two years later                                          383,584     374,336    317,199     279,561    263,473    255,379
         Three years later                                                    381,463    308,700     274,283    246,367    252,458
         Four years later                                              --          --    309,282     265,041    241,478    236,009
         Five years later                                              --          --         --     266,583    229,742    230,488
         Six years later                                               --          --         --          --    230,824    222,094
         Seven years later                                             --          --         --          --         --    223,473
         Eight years later                                             --          --         --          --         --         --
         Nine years later                                              --          --         --          --         --         --
         Ten years later                                               --          --         --          --         --         --



Net cumulative redundancy (deficiency)                 (14,628)   (4,233)       5,424     17,719      27,425     37,267     43,212
Percentage                                                           (1)%          1%         5%          9%        14%        16%
Gross Liability, end of year                           682,428    518,387     467,177    411,874     389,298    354,582    351,897
Reinsurance recoverable                                233,164    139,036      80,290     84,873      95,290     86,491     85,212
Net liability, end of year                             449,264    379,351     386,887    327,001     294,008    268,091    266,685
Gross re-estimated liability-latest                    719,143    521,011     462,384    393,765     339,514    293,613    288,355
Re-estimated recoverable-latest                        255,251    137,427      80,921     84,483      72,931     62,789     64,882
Net re-estimated liability-latest                      463,892    383,584     381,463    309,282     266,583    230,824    223,473
Gross cumulative redundancy (deficiency)               (36,715)    (2,624)      4,793     18,109      49,784     60,969     63,542


<CAPTION>
--------------------------------------------------------------------------
                                          1991        1990       1989
--------------------------------------------------------------------------
<S>                                       <C>        <C>         <C>
Net unpaid claims and claims
expenses, end of year                     $258,774   $245,105    $214,391

Cumulative amount of net
liability paid as of:
         One year later                     44,930     42,234      29,407
         Two years later                    80,725     77,183      60,888
         Three years later                 111,225    102,590      84,283
         Four years later                  127,431    124,129     101,597
         Five years later                  116,224    134,657     116,047
         Six years later                   127,130    122,089     124,465
         Seven years later                 132,194    129,100     110,656
         Eight years later                 137,401    132,888     115,017
         Nine years later                       --    136,959     117,364
         Ten years later                        --         --     120,895

Net liability re-estimated as of:

         One year later                    253,781    238,324     206,724
         Two years later                   243,488    233,565     199,864
         Three years later                 243,586    223,417     196,232
         Four years later                  241,600    224,171     188,052
         Five years later                  225,592    223,172     189,148
         Six years later                   217,852    213,327     188,884
         Seven years later                 208,701    205,179     180,619
         Eight years later                 211,487    199,948     176,778
         Nine years later                       --    202,578     172,846
         Ten years later                        --         --     175,362


Net cumulative redundancy (deficiency)      47,287     42,527      39,029
Percentage                                     18%        17%         18%
Gross Liability, end of year               332,503
Reinsurance recoverable                     73,729
Net liability, end of year                 258,774
Gross re-estimated liability-latest        268,217
Re-estimated recoverable-latest             56,730
Net re-estimated liability-latest          211,487
Gross cumulative redundancy (deficiency)    64,286
</TABLE>






                                       11
<PAGE>


In evaluating the  information in the table on the preceding  page, it should be
noted that each amount  includes the effects of all changes in amounts for prior
periods.  For example,  if a claim  determined  in 1991 to be $150,000 was first
reserved  in 1986 at  $100,000,  the  $50,000  deficiency  (actual  claim  minus
original  estimate)  would  be  included  in  the  gross  cumulative  redundancy
(deficiency)  in each of the years  1986-1991  shown on the preceding page. This
table does not present accident or policy year development data.  Conditions and
trends that have  affected  the  development  of  liability  in the past may not
necessarily  occur in the  future.  Accordingly,  it may not be  appropriate  to
extrapolate future redundancies or deficiencies based on this table.

The trend  depicted  in the table  indicates  that net unpaid  claims and claims
expense  liability  at  December  31,  1998 have  developed  unfavorably  due to
Trenwick America Re's  unfavorable  development for claims occurring in accident
years 1996 through 1998.  Net unpaid claims and claims  expenses at December 31,
1999  includes   reinsurance   recoverable  of  $46,460,000  under  the  adverse
development  cover  purchased by Chartwell in connection with its acquisition by
Trenwick. For further discussion of unpaid claims and claims expenses, see Notes
4 and 5 of Notes to the Consolidated Financial Statements of Trenwick.

Management believes that Trenwick's reserves are adequate.  However, the process
of  estimating  reserves is  inherently  imprecise and involves an evaluation of
many  variables,   including  potentially   unpredictable  social  and  economic
conditions.  Accordingly,  there can be no assurance  that  Trenwick's  ultimate
liability  will not vary  significantly  from  amounts  reserved.  The  inherent
uncertainties  of estimating  such reserves are greater for reinsurers  than for
primary  insurers,  primarily  due to the  longer-term  reporting  nature of the
reinsurance  business,  the diversity of development  patterns  among  different
types of reinsurance, the necessary reliance on ceding companies for information
regarding  reported  claims  and  differing  reserving  practices  among  ceding
companies.  Reserves  also include  provisions  for latent  injury or toxic tort
claims that cannot be estimated with traditional  reserving  techniques.  Due to
inconsistent  court  decisions in federal and state  jurisdictions  and the wide
variation  among  insureds  with  respect  to  underlying  facts  and  coverage,
uncertainty  exists with  respect to these  claims as to  liabilities  of ceding
companies and,  consequently,  reinsurance  coverage.  Management  believes that
Trenwick's  exposure to such latent losses is lessened because of its relatively
recent  entry  into the  reinsurance  business  (other  than  INSCORP),  its low
historical  levels of premium volume prior to the  application of exclusions for
asbestos and  environmental  liabilities,  its  retrocessional  programs and the
protection  afforded by Trenwick's  Contingent  Interest Notes due June 30, 2006
(the  "Contingent  Interest Notes") the payment of which is subject to reduction
in the event of such adverse reserve development related to INSCORP's business.

Reserves for Trenwick's  participation in Lloyd's syndicates through its Lloyd's
corporate  members  are  included  in the 1999  year end  reserves.  Part of the
reserve  represents  reinsurance to close balances  brought  forward to the open
years of  account  (for  example,  1996  reinsured  into the  1997  open  year).
Favorable or unfavorable  development of the prior year's reserves can influence
the results of the open years of 1997, 1998 and 1999. Consequently, there can be
no assurance as to the adequacy of reserves and the risk of future developments,
both favorable and unfavorable, exists.


                                       12
<PAGE>


 Trenwick's  reserves include an estimate of Trenwick's  ultimate  liability for
asbestos and  environmental  claims.  The gross and net unpaid claims and claims
expenses for asbestos and environmental claims are as follows:

                                                  1999         1998       1997
                                               ---------    --------   ---------
(in thousands)
Unpaid claims and claims expenses gross of
     reinsurance recoverable, end of year      $ 100,131     $ 8,476    $  8,924
Unpaid claims and claims expenses, net of
     reinsurance recoverable, end of year         72,092       8,428       8,814
Reinsurance recoverable on unpaid claims and
     claims expenses, end of year                 28,039          48         110

The increase of the gross and net unpaid claims and claims expenses  reflect the
inclusion of the reserves related to the Chartwell acquisition. Under Trenwick's
current  interpretation of policy language,  management does not believe that it
has a  material  exposure  to  environmental  claims  that  requires  additional
reserves beyond its current estimates.

Contingent Interest Notes

Upon  consummation  of the  acquisition  of Chartwell,  Trenwick  assumed all of
Chartwell's   obligations  under  the  Contingent  Interest  Notes,  which  were
originally issued by Piedmont  Management  Company Inc. to its stockholders just
prior to its  acquisition by Chartwell in 1995. The Contingent  Interest  Notes,
which mature on June 30, 2006, are designed to provide  Trenwick with protection
against adverse development of INSCORP's reserves for losses and loss adjustment
expenses.  In the  event  there  is no  adverse  development,  Trenwick  will be
required  to pay the  holders  of the CI  Notes  approximately  $55  million  in
contingent  interest.  This contingent interest payment is in addition to the $1
million  principal amount of the Contingent  Interest Notes and interest on such
principal  amount at 8% per  annum  (collectively,  the  "Fixed  Amount")  which
Trenwick  in any  event  must  pay at  maturity  or  earlier  redemption  of the
Contingent Interest Notes.

In general,  assuming the Contingent Interest Notes are settled at maturity, the
contingent interest will be equal to $55 million (a) less an amount equal to (i)
the amount of any adverse  development of the loss and loss  adjustment  expense
reserves  and  related  accounts  (including  certain  reinsurance  recoverable,
commissions  and unearned  premiums)  of INSCORP  recorded as of March 31, 1995,
minus (ii) $25 million,  (b) plus the amount of certain tax benefits received or
recorded by Trenwick as a result of the amount determined pursuant to clause (a)
above.  The amount so  calculated  may not be greater  than $55 million nor less
than a minimum  amount  equal to the  lesser of (a) $10  million  less the Fixed
Amount  and (b) the tax  benefits  referred  to  above.  In the  event  that the
Contingent  Interest Notes are settled prior to maturity,  the foregoing formula
will in  general  apply,  except  that the $55  million  maximum  amount  of the
Contingent  Interest  Notes will be reduced  to an amount  equal to $55  million
discounted  back  from  June  30,  2006  at a  discount  rate  of 8% per  annum,
compounded  annually,  and the tax benefits  will be  calculated in a prescribed
manner.

The carrying value of the Contingent  Interest Notes on Trenwick's  consolidated
financial  statements at December 31, 1999 was $34.7 million,  representing  the
sum of the aggregate  principal amount of the Contingent  Interest Notes and the
present  value as of such  date of the  maximum  amount of  contingent  interest
payable on the  Contingent  Interest  Notes at their  stated  maturity  in 2006.




                                       13

<PAGE>

During the term of the Contingent  Interest Notes, the discounted carrying value
of the Contingent  Interest Notes will be increased to reflect  accretion of (i)
interest on the principal amount and (ii) the discounted contingent interest. To
the extent that  adverse  development  of  INSCORP's  reserves  (including  IBNR
reserves) occurs prior to the maturity or redemption of the Contingent  Interest
Notes, the contingent  interest  payable on the Contingent  Interest Notes (and,
therefore,  the then-current  carrying value of such Contingent  Interest Notes)
will be  reduced.  Such  reductions  in the  carrying  value  of the  Contingent
Interest  Notes  would  offset  in part,  in the  period in which  such  adverse
development   occurs,   any  reduction  in   Trenwick's   GAAP  net  income  and
stockholders'  equity  resulting  from such adverse  reserve  development  (that
would, however,  still be reflected in Trenwick's statutory underwriting results
and in the policyholders' surplus of INSCORP and any parent insurer of INSCORP).

At its option,  Trenwick may settle the Contingent Interest Notes with shares of
common stock of Trenwick  instead of payment of cash. For purposes of settlement
of the Contingent  Interest  Notes,  such common stock would be valued at 85% of
its average closing market price over a specified period prior to the settlement
date.  However,  Trenwick may not settle the  Contingent  Interest  Notes in its
common stock unless (i) such stock is  registered  under the  Securities  Act of
1933 (or is  otherwise  freely  tradeable  other than by certain  affiliates  of
Trenwick),  (ii) such stock is listed on a national  securities  exchange or the
NASDAQ  National  Market and (iii) all Contingent  Interest Notes are settled in
such common stock.  Moreover,  Trenwick may not settle the  Contingent  Interest
Notes in its common stock if the  Contingent  Interest  Notes are being  settled
following  acceleration  thereof due to an event of default under the Contingent
Interest Notes.

Reinsurance and Retrocessional Agreements

Trenwick enters into reinsurance and retrocessional agreements to reduce its net
liability on individual risks,  protect against catastrophic losses and maintain
acceptable ratios.

Trenwick America Re has various retrocessional facilities, all of which are on a
treaty basis.  These  retrocessional  facilities include one treaty for Trenwick
America Re's facultative casualty reinsurance business,  which applies on a risk
or account basis,  and two for its treaty  property  business,  which protect it
against multiple claims arising out of a single occurrence or event. As a result
of these facilities,  Trenwick America Re's maximum retention generally does not
exceed  $500,000 per  occurrence  on  facultative  business and  $2,300,000  per
occurrence on property catastrophe business. From 1989 to 1999, Trenwick America
Re  has  purchased  aggregated  excess  of  loss  ratio  treaties  from  several
reinsurers.  These  facilities  provided  Trenwick  with a layer  of  protection
against  adverse  results  from its  domestic  casualty  business  in  excess of
specified  loss ratios.  Trenwick  did not purchase an aggregate  excess of loss
ratio treaty for 2000.

Trenwick  International,  as customary  with  companies  operating in the London
market,  buys  large  amounts of  reinsurance.  Reinsurance  and  retrocessional
coverage is  customized  for each class of business.  During 1998,  following an
increase in its share capital, Trenwick International increased its retention of
business by reducing the amount of reinsurance it buys, principally proportional
reinsurance treaties with its former parent.

Chartwell  Managing Agency, as part of its business  strategy,  has historically
purchased a  significant  amount of  reinsurance  for the Lloyd's  syndicates it
manages.  Reinsurance is generally  purchased to protect the syndicates  against
extraordinary  loss or loss  involving  one or more  underwriting  classes.  The
amount  purchased is  determined  with  reference to the  syndicates'  aggregate
exposure and potential loss scenarios.

Canterbury Financial Group purchases  reinsurance  specifically tailored to each
of the specialty programs underwritten by its insurance subsidiaries.


                                       14
<PAGE>

In  connection  with the  acquisition  of  Chartwell  by  Trenwick,  Chartwell's
insurance company subsidiaries purchased an aggregate excess of loss reinsurance
agreement  providing  up to  $100  million  in  coverage  against  unanticipated
increases in Chartwell's  reserves for business written on or before October 27,
1999, the date of completion of the  acquisition  of Chartwell.  Within the $100
million  maximum,  the  protection  is limited  to $100  million  for  increased
reserves  attributable  to  Chartwell's  Lloyd's  operations,  $25  million  for
increased  reserves  attributable  to  catastrophe  and year 2000 losses and $50
million  for  increased  reserves  attributable  to asbestos  and  environmental
coverage  losses.  The  aggregate  excess of loss  reinsurance  agreement is not
cancelable  by the  reinsurers,  London  Life  and  Scandanavian  Re  and  their
obligations  have been secured by a trust account.  The premium payable for this
aggregate excess of loss reinsurance agreement was approximately $56 million.

Trenwick  remains liable with respect to insurance and reinsurance  ceded in the
event that the insurer or  retrocessionaire  is unable to meet its  obligations.
All reinsurers and retrocessionaires  must be formally approved by the operating
company's Security Committee.  The Security Committees re-evaluate the financial
condition of Trenwick reinsurers and  retrocessionaires  at least annually.  The
evaluation process involves financial analysis of current audited financial data
and comparative analysis of such data in accordance with guidelines  established
by Trenwick.  Business may not be conducted with  retrocessionaires  who are not
currently approved by the Security Committees.

Trenwick  America  Re's  principal  retrocessionaires  are  Zurich  Reinsurance,
Continental  Casualty  Company,  Unum Life  Insurance  Company  of  America  and
National    Union   Fire   Insurance    Company.    Chartwell   Re's   principal
retrocessionaires  are Centre  Reinsurance  (Bermuda)  Limited,  London Life and
Casualty  Reinsurance  Corp.  and  Scandinavian   Reinsurance  Company  Limited.
INSCORP's  largest  reinsurers  in  1999  were  American   Reinsurance  Company,
Navigators  Insurance  Company and European  International  Reinsurance  Company
Limited. Trenwick International has two principal  retrocessionaires,  Lloyds of
London and Transatlantic Re. All these retrocessionaires are rated A (Excellent)
or better by A.M. Best Company.  At December 31, 1999,  Trenwick had no material
uncollectible amounts due from its retrocessionaires.

Investments

The Investment  Committee of Trenwick's Board of Directors oversees  investments
and sets procedures and guidelines for investment strategy.  Trenwick's internal
staff manage these investments and utilize the services of investment  advisers.
Trenwick's  investment  strategy  focuses  on  capital  preservation  and income
predictability. This strategy also requires that the risks associated with these
objectives are properly managed.  Accordingly,  Trenwick  emphasizes  investment
grade debt investments.  At December 31, 1999, 79% of Trenwick's  investments in
debt securities were rated Aa or better. In October 1998, certain securities had
their ratings  withdrawn by various  nationally  recognized  statistical  rating
organizations. The servicer of these securities,  Commercial Financial Services,
Inc.,  filed for protection  under Chapter 11 of the Federal  Bankruptcy Code in
December 1998. During 1999, Trenwick wrote down the value of these securities by
$5.2 million.

Trenwick's  investment strategy permits an allocation for equity securities.  At
December 31, 1999, 6% of Trenwick's total  investments and cash were invested in
common and preferred  equities,  which consist primarily of securities issued by
U.S. and United Kingdom  corporations.  The primary risk  associated  with these
securities is the exposure to daily market fluctuations.


                                       15

<PAGE>

The investments of each of Trenwick's insurance company subsidiaries must comply
with the  respective  insurance  laws of the  jurisdiction  of  domicile of that
insurance  company,  and of the other  jurisdictions  in which it is licensed or
authorized.  These  laws  prescribe  the  kind,  quality  and  concentration  of
investments  which may be made by insurance  companies.  In general,  these laws
permit   investments,   within   specified   limits   and   subject  to  certain
qualifications,  in federal, state and municipal  obligations,  corporate bonds,
preferred and common stock,  real estate  mortgages and real estate.  These laws
generally  penalize  high  concentrations  of  riskier  types of assets and high
exposures to certain types of issuers.

Trenwick  invests  in  three  types  of  structured  securities,  collateralized
mortgage  obligations  ("CMO"),  mortgage-backed  securities  not backed by U.S.
government agencies ("non-agency MBS") and asset-backed securities ("ABS"), each
accounting for 5%, 5% and 2%, respectively,  of Trenwick's portfolio at December
31, 1999.

CMOs  consist  of  planned   amortization   classes  ("PACs")  which  have  been
constructed  with a certain  amount of call  protection  and CMOs that have lost
their PAC protection (sometimes called "broken" or "busted" PACs), due to actual
prepayments being significantly higher or lower than originally forecast.  These
agency  backed CMOs are not subject to credit  risk,  as all holdings are backed
indirectly or directly by the Federal  government  or one of its  agencies.  The
material risk inherent to holding these CMOs is prepayment  risk,  which relates
to  the  timing  of  cash  flows  that  result  from  amortization,  whether  it
accelerated,  because of lower interest rates and therefore higher than expected
prepayments,  or  decelerated,  because of higher  interest  rates and therefore
lower  than  expected   prepayments.   Changes  in  principal  repayments  could
negatively affect investment income due to the timing of the reinvested funds.

Non-agency MBSs are constructed  primarily from the  securitization of mortgages
on commercial or residential  real estate and,  lacking any agency backing,  are
inherently  subject to credit risk. They also have an element of prepayment risk
which  is  contingent  on the  structure  of each  security  and its  underlying
collateral.  93% of the  non-agency  MBS issues  Trenwick has  purchased  have a
rating of A or better from  various  Nationally  Recognized  Statistical  Rating
Organizations.

The  asset-backed  securities  owned by Trenwick have primarily  credit card and
home equity receivables as collateral and are subject also to credit risk. These
securities have less cash flow  uncertainty  than non-agency MBS and CMO issues,
because  the  issuer  has  the  ability  to  add in new  collateral  should  the
asset-backed security experience faster prepayments,  or in the event of default
on the  underlying  collateral.  94% of the  asset-backed  securities  owned  by
Trenwick  are rated A or better by  various  Nationally  Recognized  Statistical
Rating  Organizations.  The  remaining  6% include the  asset-backed  securities
serviced by  Commercial  Financial  Services,  Inc. for which  ratings have been
withdrawn.

Trenwick also invests in agency pass-through  securities which account for 7% of
Trenwick's  portfolio at December 31, 1999. As with CMOs,  these  securities are
subject to prepayment risk.

Trenwick holds debt  securities and cash in a number of currencies.  At December
31, 1999,  approximately 16% of Trenwick's debt securities and cash were held in
U.K. sterling, and the remainder in six other currencies.




                                       16
<PAGE>
The table below sets forth the distribution of Trenwick's  investments available
for sale at December 31, 1999 by type, maturity and quality rating.
<TABLE>
<CAPTION>
                                                                  Investments
                                                             (dollars in thousands)
                                                            Average     Estimated
                                                            Maturity    Fair       Amortized
                                                            In Years    Value         Cost
<S>                                                           <C>   <C>          <C>
Type (debt securities)
U.S. Government bonds                                          4.3  $   114,537  $   114,839
Obligations of states and political subdivisions(1)            6.3      454,993      460,176
Mortgage-backed and asset-backed securities                    8.1      288,535      290,801
Debt securities issued by British government                   3.7      115,023      117,165
Debt securities issued by other foreign governments            4.9       54,996       55,436
Public utilities                                              14.7       20,891       21,229
Corporate securities                                           8.3      259,446      262,855
Certificates of deposit                                         .2        2,940        2,937
                                                                    -----------  ------------
Total debt securities                                          6.8  $ 1,311,361  $ 1,325,438
                                                                    ===========  ============
Maturity (debt securities)
Due in one year or less                                         .5       94,546       93,913
Due in one year through five                                   2.9      544,077      545,161
Due after five years through ten years                         7.3      482,652      490,465
Due after ten years                                           19.1      190,086      195,899
                                                                    -----------  ------------
      Total debt securities                                    6.8  $ 1,311,361  $ 1,325,438
                                                                    ===========  ============
Quality (debt securities)
Aaa(2)-U.S. government bonds                                        $   114,537  $   114,839
      Obligations of states and political subdivisions                  349,474      352,936
      Mortgage-backed and asset-backed securities                       211,980      211,775
      Debt securities issued by British government                      115,023      117,165
      Debt securities issued by other foreign governments                31,402       31,783
      Corporate securities                                               14,585       14,959
      Certificates of deposit                                             1,991        1,988
                                                                    -----------  ------------
                                                                        838,992      845,445
                                                                    -----------  ------------

Aa(2)-Obligations of states and political subdivisions                   77,762       78,661
      Mortgage-backed and asset-backed securities                        44,554       45,923
      Corporate securities                                               58,250       58,558
      Debt securities issued by other foreign governments                16,707       16,715
      Public utilities                                                    2,438        2,483
                                                                    -----------  ------------
                                                                        199,711      202,340
                                                                    -----------  ------------
A(2)-Obligations of states and political subdivisions                    16,006       16,232
      Mortgage-backed and asset-backed securities                        24,522       25,465
      Debt securities issued by other foreign governments                 6,887        6,938
      Public utilities                                                   13,065       13,152
      Corporate securities                                              105,932      106,928
      Certificates of deposit                                               809          809
                                                                    -----------  ------------
                                                                        167,221      169,524
                                                                    -----------  ------------
Baa(2)-Obligations of states and political subdivisions                  11,751       12,347
      Mortgage-backed and asset-backed securities                         5,983        6,142
      Public utilities                                                    4,335        4,469
      Corporate securities                                               56,631       57,476
                                                                    -----------  ------------
                                                                         78,700       80,434
                                                                    -----------  ------------
Ba(2)-Public utilities                                                    1,053        1,125
      Corporate securities                                               12,543       13,032
                                                                    -----------  ------------
                                                                         13,596       14,157
                                                                    -----------  ------------
B(2)-Corporate securities                                                11,143       11,495
                                                                    -----------  ------------
Caa(2)-Corporate securities                                                 138          183
                                                                    -----------  ------------
P1(2)-Certificates of deposits                                              140          140
                                                                    -----------  ------------
      Non-rated Corporate security                                          224          224
                                                                    -----------  ------------
      Withdrawn - Asset-backed securities                                 1,496        1,496
                                                                    ===========  ============
      Total debt securities                                         $ 1,311,361  $ 1,325,438
                                                                    -----------  ------------
</TABLE>
<PAGE>

(1)   Obligations  of  states  and  political subdivisions  include  $38,240,000
      escrowed in U.S. Government Securities, $242,320,000 insured by  Municipal
      Bond   Investors  Assurance  Corporation,  Financial  Guaranty   Insurance
      Company,  AMBAC  Indemnity  Corporation,  or  Financial Security Assurance
      Corporation and $29,940,000 both escrowed and insured.

(2)   Quality  rating as assigned by Moody's  Investors  Service,  Inc.  for all
      except certain  mortgage-backed  securities not backed by U.S.  government
      agencies and certain  asset-backed  securities.  Quality ratings for these
      other securities are as assigned by Fitch Investors Service,  Standard and
      Poor's  or Duff  and  Phelps.  Ratings  are  generally  assigned  upon the
      issuance  of the  securities,  subject to revision on the basis of ongoing
      evaluations.



                                       17
<PAGE>


Regulation

Trenwick  and its  insurance  company  subsidiaries  are  subject to  regulatory
oversight under the insurance  statutes and regulations of the  jurisdictions in
which they conduct  business,  including all states of the United States and the
United Kingdom. These regulations vary from jurisdiction to jurisdiction and are
generally  designed to protect ceding insurance  companies and  policyholders by
regulating   Trenwick's   financial  integrity  and  solvency  in  its  business
transactions  and  operations.  Many of the insurance  statutes and  regulations
applicable to Trenwick's  subsidiaries relate to reporting and enable regulators
to closely monitor  Trenwick's  performance.  Typical  required  reports include
information  concerning  Trenwick's  capital  structure,   ownership,  financial
condition, and general business operations.

Trenwick  International  is subject to the  regulatory  authority  of the United
Kingdom  Financial  Services  Authority.  Both  Chartwell  Managing  Agents  and
Trenwick's  dedicated  Lloyd's  underwriting  entities,  as a  Lloyd's  managing
general  agent and  Lloyd's  corporate  members,  respectively,  are  subject to
regulation and supervision by the Council of Lloyd's.  Lloyd's  operates under a
self-regulatory  regime  under  the  Lloyd's  Act 1982 and has the power to set,
interpret and change the rules which govern the operation of the Lloyd's market,
subject to regulation for solvency purposes by the Financial Services Authority.
Lloyd's  prescribes,  in respect of its managing  agents and corporate  members,
certain minimum standards relating to their management and control, solvency and
various other requirements.  In addition,  Lloyd's imposes  restrictions against
persons  becoming  controllers  and major  shareholders  of managing  agents and
corporate members without the consent of Lloyd's first having been obtained. The
United Kingdom  government has established the Financial Services Authority as a
single  regulator  to  supervise  securities,  banking and  insurance  business,
including  Lloyd's.  When the  Financial  Services  and Market Bill becomes law,
probably  in  late  2000,  the  Financial  Services  Authority  will  have  wide
authorization  and  intervention  powers in relation to Lloyd's.  A consultation
process has commenced in relation to Lloyd's regulatory framework.

NAIC

The National Association of Insurance  Commissioners ("NAIC") is an organization
which  assists  state  insurance  supervisory  officials in achieving  insurance
regulatory  objectives,  including  the  maintenance  and  improvement  of state
regulation.  From time to time various  regulatory and legislative  changes have
been proposed in the insurance  industry,  some of which could have an effect on
reinsurers.  Among the  proposals  that have in the past been or are at  present
being considered are the possible introduction of federal regulation in addition
to, or in lieu of, the  current  system of state  regulation  of  insurers,  and
proposals  in various  state  legislatures  (some of which  proposals  have been
enacted) to conform  portions of their insurance laws and regulations to various
model acts adopted by the NAIC.  Trenwick is unable to predict  what effect,  if
any, these developments may have on its operations and financial condition.  See
Item 7, Management's  Discussion and Analysis of Financial Condition and Results
of Operations.

Risk Based Capital

The NAIC has adopted  Risk-Based  Capital ("RBC")  requirements for property and
casualty  insurance  companies to evaluate the adequacy of statutory capital and
surplus in relation to  investment  and insurance  risks such as asset  quality,
asset and liability matching,  loss reserve adequacy and other business factors.
The RBC formula is used by state  insurance  regulators as an early warning tool
to  identify,  for  the  purpose  of  initiating  regulatory  action,  insurance
companies  that  potentially  are  inadequately  capitalized.  In addition,  the
formula  defines  minimum  capital  standards that  supplement the system of low
fixed  minimum  capital  and surplus  requirements  on a  state-by-state  basis.
Regulatory  compliance is determined by a ratio of the  enterprise's  regulatory
total adjusted  capital to its  authorized  control level RBC, as defined by the
NAIC.  Enterprises below specific trigger points or ratios are classified within
certain levels, each of which requires specific corrective action. The ratios of
Total  Adjusted  Capital to Authorized  Control Level RBC for each of Trenwick's
United States insurance company subsidiaries exceeded all the RBC trigger points
at December 31, 1999, 1998 and 1997.


                                       18

<PAGE>

State Insurance Regulation

The  premium  rates  and  policy  terms  of  Trenwick's  reinsurance  agreements
generally  are not  subject to  regulation  by any  government  authority.  This
contrasts with Trenwick's  property and casualty insurance  operations where the
premium  rates  and  policy  terms  are  generally  closely  regulated  by state
insurance departments. As a practical matter, however, the premium rates charged
by insurers may place a limit on the rates which can be charged by reinsurers.

The regulation and supervision to which  Trenwick's  insurance  subsidiaries are
subject  relate  primarily  to the  standards  of solvency  that must be met and
maintained, licensing requirements for reinsurers, the nature of and limitations
on investments, restrictions on the size of risks which may be insured, deposits
of securities for the benefit of insureds or reinsureds,  methods of accounting,
periodic examinations of the financial condition and affairs of reinsurers,  the
form and content of reports of  financial  condition  required to be filed,  and
reserves for unearned  premiums,  losses and other  purposes.  In general,  such
regulation  is for the  protection of the insureds and  reinsureds,  rather than
Trenwick's security holders. Trenwick believes that it is in compliance with all
such material regulations.

Trenwick is subject to  regulation  under the  insurance  statutes and insurance
holding company statutes of various states, including Connecticut,  New York and
North Dakota,  the domicile states of its U.S. insurance  companies.  These laws
and  regulations  vary from state to state,  but generally  require an insurance
holding  company,  and  insurers  and  reinsurers  that are  subsidiaries  of an
insurance holding company, to register with the state regulatory authorities and
to file with those authorities certain reports including information  concerning
their capital  structure,  ownership,  financial  condition and general business
operations.

State laws also require prior notice or regulatory  agency approval of direct or
indirect changes in control of an insurer,  reinsurer or its holding company and
of certain  significant  intercorporate  transfers of assets  within the holding
company  structure.   An  investor  who  acquires  securities   representing  or
convertible into more than 10% of the voting power of the securities of Trenwick
would become subject to at least some of such  regulations  and would be subject
to  approval  by  the   Connecticut,   New  York  and  North  Dakota   Insurance
Commissioners  prior to  acquiring  such  shares.  Such  investor  would also be
required to file certain  notices and reports with the  Insurance  Commissioners
prior to such acquisition.

Codification of Statutory Accounting Principles

In March  1998,  the NAIC  adopted  the  Codification  of  Statutory  Accounting
Principles ("Codification").  The Codification, which is intended to standardize
regulatory  accounting and reporting for the insurance industry,  is proposed to
be January 1, 2001. The Codification provides guidance for areas where statutory
accounting  has been silent and changes  current  statutory  accounting  in some
areas. However,  statutory accounting principles will continue to be established
by individual state laws and permitted practices. Effective January 1, 2001, the
states of Connecticut  (domicile of Trenwick America Re), Minnesota (domicile of
Chartwell  Reinsurance),  New York  (domicile  of  INSCORP  and ReCor) and North
Dakota  (domicile of Dakota) will adopt the  Codification.  It is uncertain what
effect adoption of the Codification  for the preparation of statutory  financial
statements would have on those statutory financial statements.





                                       19
<PAGE>

Dividends

Because Trenwick's operations are conducted through its operating  subsidiaries,
Trenwick  is  dependent  upon the  ability  of its  operating  subsidiaries,  to
transfer funds,  principally in the form of cash dividends,  tax  reimbursements
and other  statutorily  permissible  payments.  In  addition  to  general  legal
restrictions  on payments of dividends and other  distributions  to shareholders
applicable to all corporations, Trenwick's insurance subsidiaries are subject to
further  regulations that, among other things,  restrict the amount of dividends
and other distributions that may be paid to their parent corporations.

Under the  applicable  provisions of the insurance  holding  company laws of the
states of domicile of Trenwick  America Re,  Chartwell  Reinsurance  and Dakota,
such  companies  may only pay dividends  without the approval of the  applicable
state insurance regulator, if such dividends, together with other dividends paid
within the preceding twelve months,  are less than the greater of (i) 10% of the
insurer's  policyholders'  surplus as of the end of the prior  calendar  year or
(ii) the insurer's  statutory net income,  excluding realized capital gains, for
the  prior  calendar  year.  As a further  restriction,  the  maximum  amount of
dividends  most U.S.  insurers  may pay is limited to its earned  surplus,  also
known as its unassigned  funds. Any dividend in excess of the amount  determined
pursuant to the foregoing  formula would be characterized  as an  "extraordinary
dividend" requiring the prior approval of the state insurance regulator.

Under New York law, which is applicable to INSCORP and ReCor  Insurance  Company
Inc.  ("ReCor") the maximum ordinary dividend payable in any twelve month period
without the approval of the New York  Insurance  Department is the lesser of (i)
10% of policyholders  surplus as shown on the company's last annual statement or
any  more  recent  quarterly  statement  or  (ii)  the  company's  adjusted  net
investment  income.  Adjusted net investment income is defined as net investment
income for the twelve months  preceding the declaration of the dividend plus the
excess, if any, of net investment income over dividends  declared or distributed
during the period  commencing  thirty-six  months  prior to the  declaration  or
distribution of the current dividend and ending twelve months prior thereto.  In
any case, New York law permits the payment of an ordinary dividend by an insurer
or reinsurer only out of earned surplus.

In addition to the foregoing limitations,  the New York Insurance Department, as
is its practice in any change of control situation,  required Trenwick to commit
to preclude the acquired New  York-domiciled  insurers,  INSCORP and ReCor, from
paying any dividends for two years after the merger with Chartwell without prior
regulatory approval.  The foregoing restriction will expire on October 27, 2001.
Neither INSCORP nor ReCor paid any dividends in 1997, 1998 or 1999.

Moreover, insurance holding company laws generally provide that, notwithstanding
the  receipt of any  dividend  from a  subsidiary  insurer,  an insurer may make
dividend  payments  to its parent  only to the extent it is  permitted  to do so
under its applicable  dividend  restrictions.  In other words,  the ability of a
subsidiary  insurer to pay dividends without  restriction may be impaired if its
parent insurer cannot pay dividends without restriction.

The maximum  dividend  permitted  by law may not be  indicative  of an insurer's
actual ability to pay dividends,  which may be constrained by business and other
regulatory  considerations,  such as the impact of dividends  on surplus,  which
could  affect an  insurer's  ratings  or  competitive  position,  the  amount of
premiums  that  can  be  written  and  the  ability  to  pay  future  dividends.
Furthermore,  beyond the limits described in the preceding paragraph,  insurance
regulatory  authorities  often  have the  discretion  to limit  the  payment  of
dividends by insurance companies domiciled in their jurisdictions.



                                       20
<PAGE>

In 2000,  of Trenwick's  U.S.  insurance  subsidiaries,  only Dakota could pay a
dividend  or  other  distribution  without  prior  approval  of  the  applicable
insurance regulatory  authority.  In 2000, Dakota Specialty could pay a dividend
of $2.8 million  without prior approval.  During 1999,  1998 and 1997,  Trenwick
America Re paid  dividends of $53.4  million,  $30.1  million and $8.3  million,
respectively.  Chartwell Reinsurance paid dividends of $30.3 million in 1999 and
$3.0 million in 1997.  Chartwell  Reinsurance did not pay any dividends in 1998.
None of Trenwick's other U.S. insurance subsidiaries paid any dividends in 1999,
1998 or 1997.

Under the applicable  laws of the United Kingdom,  Trenwick's U.K.  subsidiaries
may make shareholder  distributions only from accumulated  realized profits, net
of accumulated realized losses. In addition,  under the U.K. Insurance Companies
Act, Trenwick International is not permitted to make any distribution that would
reduce its net assets below the required  minimum margin of solvency  which,  as
determined under the U.K. Financial Service  Authority's rules, is approximately
$16.7 million as of December 31, 1999.  Trenwick  International must also notify
the United Kingdom  Financial  Services  Authority of any proposal to declare or
pay a dividend on any of its share capital. Under Lloyd's regulations, Chartwell
Managing Agents is not permitted to make any  distribution  that would cause its
assets to fall below any of Chartwell  Managing  Agents' share capital,  minimum
net current asset margin or minimum net asset  margin.  As of December 31, 1999,
the highest of the three tests required  Chartwell  Managing  Agents to maintain
approximately $1.1 million of capital.

Investment Limitations

Connecticut, New York and North Dakota laws and regulations govern the types and
amounts of investments  which are permissible for Trenwick's  insurance  company
subsidiaries.  These rules are  designated to ensure the safety and liquidity of
the insurers' investment portfolio.  In general,  these rules permit insurers to
purchase  only  investments  which  are  interest  bearing,  interest  accruing,
entitled to dividends or otherwise income earning and not then in default in any
respect,  and insurers must be entitled to receive for its exclusive account and
benefit the interest or income  accruing  thereon.  No security or investment is
eligible  for  purchase  at a price  above its fair  value or market  value.  In
addition,  these rules require  investments by Trenwick to be  diversified.  The
U.K.  Financial  Services Authority governs the types and amounts of investments
which are  permissible for insurers in the United  Kingdom,  including  Trenwick
International.  Likewise,  Lloyd's  regulations  govern the types and amounts of
investments that are permissible for Chartwell  Managing Agents to make with the
assets of the Lloyd's  syndicates  that it  manages.  These laws  penalize  high
concentrations of riskier types of assets and high exposures to certain types of
issuers. Trenwick believes that it is in compliance with all material applicable
investment laws.

Employees

At December  31, 1999,  Trenwick  employed a total of 124 and 284 persons in its
domestic and international operations,  respectively.  Trenwick has no employees
represented by a labor union and believes that its employee relations are good.




                                       21

<PAGE>



                      TRENWICK GROUP INC. AND SUBSIDIARIES
            SCHEDULE II-CONDENSED FINANCIAL INFORMATION OF REGISTRANT

                               TRENWICK GROUP INC.
                                  BALANCE SHEET
                              (Parent Company Only)

                                                              December 31,
                                                    ----------------------------
                                                         1999            1998
                                                    ------------     -----------
                                                             (in thousands)
Assets:
     Investments in consolidated subsidiaries       $  558,151       $  532,069
     Cash and cash equivalents                           2,331              523
     Due from consolidated subsidiaries                 57,526            4,287
     Deferred debt issuance costs                        6,388            2,463
     Accrued investment income                             128              125
     Net deferred income taxes                          15,000            4,198
     Goodwill                                          153,824            1,605
     Other assets                                        9,421                9
                                                    ------------     -----------
     Total assets                                   $  802,769       $  545,279
                                                    ============     ===========

Liabilities:
     6.70% Senior notes due 2003                    $   75,000       $   75,000
     Junior subordinated debentures                    113,403          113,403
     Contingent interest notes                          34,699                -
     Due to consolidated subsidiaries                   10,965            2,700
     Accrued interest expense                            5,497            5,424
     Chase syndicated senior credit facilities          94,501                -
     Other liabilities                                   6,455              723
                                                    ------------     -----------

     Total liabilities                                 340,520          197,250

Stockholders' equity                                   462,249          348,029
                                                    ------------     -----------

     Total liabilities and stockholders' equity     $  802,769       $  545,279
                                                    ============     ===========





                                      S-1
<PAGE>



                      TRENWICK GROUP INC. AND SUBSIDIARIES
     SCHEDULE II--CONDENSED FINANCIAL INFORMATION OF REGISTRANT-(continued)

                               TRENWICK GROUP INC.
                               STATEMENT OF INCOME
                              (Parent Company Only)

                                                   Year ended December 31,
                                         ---------------------------------------
                                             1999           1998         1997
                                         -----------   ------------   ----------
                                                       (in thousands)
Revenues:
Consolidated subsidiary dividends        $  46,100      $  26,600     $   8,250
Net investment income                          358          1,500         4,974
Net realized investment gains                    -            778             -
Other income                                     1             12             -
                                         -----------   ------------   ----------

     Total revenues                         46,459         28,890        13,224

Interest and operating expenses             16,938         13,950        10,090
Amortization expense                         1,423             33             -

Income before income taxes, equity in
  undistributed income of unconsolidated
  subsidiaries and extraordinary item       28,098         14,907         3,134
Income tax benefit                          (5,077)        (3,942)       (1,239)
                                         -----------   ------------   ----------
Income before equity in undistributed
   income of consolidated subsidiaries      33,175         18,849         4,373
Equity in undistributed income (loss)
   of consolidated subsidiaries            (44,223)        15,943        31,916
                                         -----------   ------------   ----------
Income (loss) before extraordinary
   loss on debt redemption                 (11,048)        34,792        36,289
Extraordinary loss on debt redemption,
     net of $558 income tax benefit              -              -         1,037
                                         -----------   ------------   ----------
Net income (loss)                        $ (11,048)     $  34,792     $  35,252
                                         ===========   ============   ==========












                                      S-2


<PAGE>




                      TRENWICK GROUP INC. AND SUBSIDIARIES
     SCHEDULE II--CONDENSED FINANCIAL INFORMATION OF REGISTRANT-(continued)

                               TRENWICK GROUP INC.
                             STATEMENT OF CASH FLOWS
                              (Parent Company Only)
<TABLE>
<CAPTION>

                                                                        Year ended December 31,
                                                              -----------------------------------------------
                                                                      1999           1998           1997
                                                              ----------------    ------------   ------------
                                                                             (in thousands)
<S>                                                                <C>            <C>            <C>
Cash flows from operating activities:
     Dividends and net investment income received                  $  46,466      $  28,548      $  12,642
     Interest and operating expenses paid                            (14,979)       (11,786)        (4,983)
     Income taxes received                                             3,669          5,035            794
                                                              ----------------    ------------   ------------

     Cash provided by operating activities                            35,156         21,797          8,453
                                                              ----------------    ------------   ------------

Cash flows for investing activities:
     Purchases of debt securities                                          -        (16,637)       (72,932)
     Sales of debt securities                                              -         88,190              -
     Maturities of debt securities                                         -            911         16,050
     Investment in subsidiaries                                       (8,282)      (130,582)        (3,403)
                                                              ----------------    ------------   ------------

     Cash used for investing activities                               (8,282)       (58,118)       (60,285)
                                                              ----------------    ------------   ------------

Cash flows from financing activities:
     Issuance of senior notes                                              -         75,000              -
     Issuance of junior subordinated debentures                            -              -        113,403
     Issuance costs of senior notes and capital securities            (4,055)          (922)        (1,669)
     Long term debt proceeds                                          94,473              -              -
     Redemption of convertible debentures                                  -              -        (46,997)
     Issuance of common stock                                              -          1,536            956
     Repurchase of common stock                                      (44,604)       (34,880)          (171)
     Dividends paid                                                  (12,787)       (11,698)       (11,546)
     Intercompany loans                                              (58,093)         2,700              -
                                                              ----------------    -----------    ------------

     Cash provided by financing activities                           (25,066)        31,736         53,976
                                                              ----------------    -----------    ------------

Change in cash and cash equivalents                                    1,808         (4,585)         2,144

Cash and cash equivalents, beginning of year                             523          5,108          2,964
                                                              ----------------    -----------    ------------

Cash and cash equivalents, end of year                             $   2,331      $     523      $   5,108
                                                              ================    ===========    ============

</TABLE>






                                      S-3



<PAGE>


                      TRENWICK GROUP INC. AND SUBSIDIARIES
               SCHEDULE III -- SUPPLEMENTARY INSURANCE INFORMATION
                                 (in thousands)
<TABLE>
<CAPTION>
                                                                             1999        1998       1997
                                                                          -----------  ----------  ---------
<S>                                   <C>                                   <C>          <C>          <C>
Deferred policy acquisition costs     Trenwick America Re                     $34,757    $21,023     $22,524
                                      Canterbury Financial Group                3,215          -           -
                                      Trenwick International                   19,982     14,238           -
                                      Chartwell Managing Agents                20,942          -           -
                                                                          -----------  ----------  ---------
                                                                               78,896     35,261      22,524

Unpaid claims and claim expenses      Trenwick America Re                   1,201,954    546,292     518,387
                                      Canterbury Financial Group              142,215          -           -
                                      Trenwick International                  164,264    136,136           -
                                      Chartwell Managing Agents               455,706          -           -
                                                                          -----------  ----------  ---------
                                                                            1,964,139    682,428     518,387

Unearned premium income               Trenwick America Re                     110,909     75,206      87,020
                                      Canterbury Financial Group               63,133          -           -
                                      Trenwick International                  100,336     76,845           -
                                      Chartwell Managing Agents               105,306          -           -
                                                                          -----------  ----------  ---------
                                                                              379,684    152,051      87,020

Net premiums earned                   Trenwick America Re                     166,906    174,443     190,156
                                      Canterbury Financial Group               10,343          -           -
                                      Trenwick International                  107,911     71,118           -
                                      Chartwell Managing Agents                39,954          -           -
                                                                          -----------  ----------  ---------
                                                                              325,114    245,561     190,156

Net Investment Income                 Trenwick America Re                      49,315     44,490      43,692
                                      Canterbury Financial Group                1,722          -           -
                                      Trenwick International                   11,253     10,614           -
                                      Chartwell Managing Agents                 3,845          -           -
                                      Unallocated                                 259      1,212       4,710
                                                                          -----------  ----------  ---------
                                                                               66,394     56,316      48,402

Claims and claims expenses incurred   Trenwick America Re                     130,603    105,478     109,554
                                      Canterbury Financial Group                5,766          -           -
                                      Trenwick International                   80,866     47,657           -
                                      Chartwell Managing Agents                37,303          -           -
                                                                          -----------  ----------  ---------
                                                                              254,538    153,135     109,554

Policy acquisition costs              Trenwick America Re                      61,633     58,310      58,549
                                      Canterbury Financial Group                  916          -           -
                                      Trenwick International                   22,627     15,887           -
                                      Chartwell Managing Agents                10,919          -           -
                                                                          -----------  ----------  ---------
                                                                               96,095     74,197      58,549

Underwriting expenses                 Trenwick America Re                      13,790     13,789      15,425
                                      Canterbury Financial Group                2,687          -           -
                                      Trenwick International                   15,364     10,006           -
                                      Chartwell Managing Agents                 5,548          -           -
                                                                          -----------  ----------  ---------
                                                                               37,389     23,795      15,425

Net premiums written                  Trenwick America Re                     155,108    169,112     195,230
                                      Canterbury Financial Group                5,641          -           -
                                      Trenwick International                  129,399     81,107           -
                                      Chartwell Managing Agents                64,462          -           -
                                                                          -----------  ----------  ---------
                                                                              354,610    250,219     195,230
</TABLE>



                                      S-4


<PAGE>




                      TRENWICK GROUP INC. AND SUBSIDIARIES
                 SCHEDULE V - VALUATION AND QUALIFYING ACCOUNTS
                PERIOD FROM OCTOBER 28, 1999 TO DECEMBER 31, 1999
                                                            (in thousands)


                                         Balance at    Charged to     Balance at
                                         Beginning     Costs and      End of
                                         of Period     Expenses       Period
                                         -----------   -----------   -----------
Period Ended December 31, 1999
Reinsurance recoverable:
  Allowance for Uncollectible
      Reinsurance (1)....................$   6,402     $    167       $  6,569
Year Ended December 31, 1998
Reinsurance recoverable:
  Allowance for Uncollectible
      Reinsurance (1)....................$   6,394     $      8       $  6,402
Year Ended December 31, 1997
Reinsurance recoverable:
  Allowance for Uncollectible
      Reinsurance (1)....................$   5,731     $    663       $  6,394

(1)            Trenwick has a reinsurance agreement which protects Trenwick from
               certain uncollectible reinsurance balances. Uncollectible amounts
               have been ceded to said contract and are reflected as reinsurance
               recoverable in the balance sheet. Deductions to reserve represent
               subsequent collections of amounts deemed uncollectible.








                                      S-5

<PAGE>






                      Report of Independent Accountants on
                          Financial Statement Schedules



To the Board of Directors of
Trenwick Group Inc.


Our audits of the consolidated  financial  statements  referred to in our report
dated  February  29,  2000,  except as to Note 19, which is as of March 1, 2000,
appearing  in the 1999 Annual  Report to  Stockholders  of  Trenwick  Group Inc.
(which  report  and  consolidated   financial  statements  are  incorporated  by
reference  in this  Annual  Report on Form 10-K) also  included  an audit of the
financial  statement schedules listed in this Annual Report on Form 10-K. In our
opinion,  these financial  statement  schedules  present fairly, in all material
respects,  the information  set forth therein when read in conjunction  with the
related consolidated financial statements.





PricewaterhouseCoopers LLP
New York, New York
February 29, 2000



















                                      S-6
<PAGE>




                                  EXHIBIT 13.1

       AMENDED EXCERPTS FROM TRENWICK'S 1999 ANNUAL REPORT TO STOCKHOLDERS
              EXPRESSLY INCORPORATED BY REFERENCE IN THIS FORM 10-K



MANAGEMENT'S DISCUSSION AND ANALYSIS
OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS

Industry Overview
The trends  experienced by the property and casualty  insurance and  reinsurance
industry   during  the  past  five  years  continued  in  1999.  The  industry's
underwriting  margins continued to experience pressure due to highly competitive
conditions.   While  the  number  of  industry  participants  declined  further,
principally  because of industry  consolidation,  the  remaining  insurance  and
reinsurance industry  participants are larger and better capitalized.  Insurers'
and reinsurers' investment portfolios, which consist principally of fixed income
securities,  continued  to  underperform  primarily  due to low  interest  rates
experienced  in recent years.  Operating cash flow declined as a result of lower
underwriting margins and continued deterioration in prior years' claim reserves.
There have recently been  indications of increases in insurance and  reinsurance
rates primarily  associated with international  property business;  however,  at
this time the  increases  reported are isolated and  sporadic,  and as such,  no
significant  improvement  in general  market  conditions is expected in the near
term.

Several years ago, in response to ongoing industry conditions, Trenwick embarked
on a strategy of  increasing  its size and the  diversity of its  insurance  and
reinsurance businesses in order to compete more effectively in the insurance and
reinsurance marketplace.

On October 27, 1999,  Trenwick,  upon its merger with Chartwell Re  Corporation,
became the  second-largest  independent  reinsurer  in the United  States on the
basis of surplus. The acquisition of Chartwell provided Trenwick with additional
cost-effective  means of augmenting  capital,  accelerating  premium  growth and
added structural  platforms for further  expansion.  The addition of Chartwell's
U.S.  reinsurance  business,   its  admitted  and  non-admitted  U.S.  insurance
companies  and its  operations  at  Lloyd's  continued  Trenwick's  strategy  of
entering new markets and product lines that began with Trenwick's acquisition of
Trenwick  International   (formerly  SOREMA  (UK)  Limited)  in  1998.  Trenwick
International,  a London market  company,  underwrites  specialty  insurance and
treaty and facultative  reinsurance on a worldwide basis.  Trenwick expects that
the merger with  Chartwell  will produce  between $15 million and $25 million in
annual expense synergies in 2000 and 2001, respectively.

Trenwick's plan to diversify and broaden its markets continued with the December
19,  1999  announcement  by  Trenwick  and  LaSalle  Re  Holdings  Limited  of a
definitive  agreement to combine the two companies,  with  shareholders  of both
companies receiving shares in a new Bermuda holding company to be named Trenwick
Group Ltd. This transaction will create a new Bermuda-based global insurance and
reinsurance  underwriting  organization with an anticipated total capitalization
of approximately $1.1 billion. The new Trenwick is expected to have larger scale
and   stronger    competitive    capabilities   in   a   consolidating    global
insurance/reinsurance  market, add higher margin business to Trenwick's existing
mix,  establish a stronger  platform to enhance  shareholder  returns and expand
Trenwick's  management depth.  Trenwick anticipates that the combined enterprise
will have a strong presence in the three most significant  insurance  markets in
the world: the United States, London and Bermuda.


                                       1
<PAGE>

On a pro forma  basis,  Trenwick  would  have had assets of  approximately  $4.0
billion and shareholders' equity,  including minority interest, of approximately
$800 million as of December 31, 1999 and combined  1999 gross  written  premiums
for Trenwick, Chartwell and LaSalle of approximately $1.0 billion.

Premium
Trenwick's gross and net  premium  writings for  its domestic and  international
operations were as follows:

                                          1999             1998           1997
                                       -----------      -----------   ----------
Gross Premiums Written
Trenwick America Re                    $210,921(1)       $218,249      $248,662
Trenwick International                  171,698           105,114(2)          -
Chartwell Managing Agents                84,834(3)              -             -
Canterbury Financial                     38,088(4)              -             -
Total                                  $505,541          $323,363      $248,662

Net Premiums Written
Trenwick America Re                    $155,108(1)       $169,112      $195,230
Trenwick International                  129,399            81,107(2)          -
Chartwell Managing Agents                64,462(3)              -             -
Canterbury Financial                      5,641(4)              -             -
Total                                  $354,610          $250,219      $195,230

(1) Includes reinsurance business of Chartwell  Reinsurance and its subsidiaries
    since its acquisition on October 27, 1999.
(2) Includes Trenwick International business since its acquisition  on  February
    27, 1998.
(3) Includes Chartwell Managing Agents business since its acquisition on October
    27, 1999.
(4) Includes Canterbury  Financial business since its acquisition on October 27,
    1999.

In 1999,  Trenwick  reported  net  premiums  written  of $354.6  million,  a 42%
increase  compared  to $250.2  million  in 1998.  Net  premiums  written in 1998
increased 28% compared to 1997.  Trenwick's  domestic net  reinsurance  premiums
written  decreased 8% in 1999 over 1998  compared to a 13% decrease in 1998 over
1997.

The decline in Trenwick's  domestic  reinsurance premium volume in 1999 and 1998
is primarily  attributable to a decline in net casualty  premium writings of 2%.
This decline  reflects  Trenwick  America Re's  withdrawal  from  accounts  when
pricing fell below what it believed to be acceptable rate levels. The decline in
net premiums  written was  magnified  by  Trenwick's  decision to buy  increased
reinsurance  protection in 1999,  1998 and 1997 at more favorable  terms than in
prior years.  Competition  among primary companies also caused cedants to reduce
their own premium writings or restructure their reinsurance  programs,  reducing
the amount of reinsurance they purchase. As a result of consolidation within the
industry,  many  ceding  companies  are now  larger  and  financially  stronger,
enabling them to retain more risk.


                                       2
<PAGE>


Trenwick  International  reported net premiums written of $129.4 million for the
year ended  December 31, 1999 compared to net premiums  written of $81.1 million
for  the   post-acquisition   period   ended   December   31,   1998.   Trenwick
International's net premium writings for the full year 1998 were $100.8 million.
While the  international  business  is also highly  competitive,  growth in this
business has occurred as a result of emerging  pockets of  opportunity  and as a
result  of  Trenwick  International's  expansion  into  new  geographic  markets
previously limited by its former parent.

During the period from October 28, 1999 to December 31, 1999, Chartwell Managing
Agents' syndicates reported net premiums written of $64.5 million. Including the
period prior to Chartwell  Managing Agents'  acquisition by Trenwick,  Chartwell
Managing Agents' syndicates  reported net premiums written of $190.4 million for
the year ended  December  31,  1999  compared to net  premiums  written of $64.9
million for the prior year. Prior to its acquisition by Trenwick,  Chartwell had
increased  significantly  the amount of capacity  it supplied to the  syndicates
managed by Chartwell Managing Agents,  resulting in the aforementioned  increase
in  premium  writings.  During  1999,  Trenwick  supplied  45.8% of the  overall
syndicate capacity for Chartwell Managing Agents.

From October 28, 1999 to December 31, 1999,  Canterbury  Financial  reported net
premiums  written of $5.6 million.  For the year ended December 31, 1999,  which
includes  the period  before  Canterbury  Financial  was  acquired by  Trenwick,
Canterbury  Financial reported net premiums of $43.8 million, a 7% decrease over
the year ended December 31, 1998. The decrease in net premium writings  resulted
principally from changes in certain reinsurance programs,  increasing the amount
of reinsurance purchased in 1999.

Operating Ratios

The following  table sets forth  Trenwick's  combined  ratios and its components
calculated on a GAAP basis for the periods indicated:
<TABLE>
<CAPTION>
                                        Claims and          Policy
                                          Claims          Acquisition        Underwriting          Total         Combined
                                       Expense Ratio     Expense Ratio      Expense Ratio      Expense Ratio     Ratio
                                       --------------   ----------------   -----------------   --------------   ----------
1999
<S>                                         <C>              <C>               <C>              <C>              <C>
Trenwick America Re(1)                      78.3%            36.9%              8.3%            45.2%            123.5%

Trenwick International                      74.9%            21.0%             14.2%            35.2%            110.1%

Canterbury Financial(2)                     55.7%             8.9%             26.0%            34.9%             90.6%

Chartwell Managing Agents(3)                93.4%            27.3%             13.9%            41.2%            134.6%

Trenwick Group                              78.3%            29.6%             11.5%            41.1%            119.4%

1998

Trenwick America Re                         60.5%            33.4%              7.9%            41.3%            101.8%

Trenwick International                      67.0%            22.3%             14.1%            36.4%            103.4%

Trenwick Group                              62.4%            30.2%              9.7%            39.9%            102.3%

1997

Trenwick America Re                         57.6%            30.8%              8.1%            38.9%             96.5%

Trenwick Group                              57.6%            30.8%              8.1%            38.9%             96.5%

</TABLE>

----------------------------------------
(1) Includes reinsurance business of Chartwell  Reinsurance and its subsidiaries
    since its acquisition on October 27, 1999
(2) Includes Canterbury Financial business since its acquisition  on October 27,
    1999
(3) Includes Chartwell Managing Agents business since its acquisition on October
    27, 1999

The combined ratio is one means of measuring the profitability of a property and
casualty  insurance  or  reinsurance   company.   The  combined  ratio  reflects
underwriting  experience,  but does  not  reflect  income  from  investments  or
provisions for income taxes.  A combined  ratio below 100% indicates  profitable
underwriting,  and  a  combined  ratio  exceeding  100%  indicates  unprofitable
underwriting.   Although  an  insurer  or   reinsurer   may  have   unprofitable
underwriting   results,  the  reinsurer  may  still  be  profitable  because  of
investment income earned on its accumulated invested assets.



                                       3
<PAGE>


The most  significant  underwriting  cost  affecting an insurance or reinsurance
company's  underwriting  result is  represented by its claims and claims expense
ratio,  which is the ratio of incurred claims and claims adjustment  expenses to
net  earned  premiums.  The claims and  claims  expense  ratio is a function  of
estimates of claims  associated with business  written in the current period and
changes in estimates of claims on business written in prior periods.

Trenwick's claims and claims expense ratio increased from 62.4% in 1998 to 78.3%
in 1999.  Trenwick's claims and claims expense ratio deteriorated in 1999 due to
the effects of property  catastrophe  claims of approximately  $12.9 million and
adverse  development  of prior year  reserves  for claims and claims  expense of
approximately $14.6 million. At December 31, 1999, losses ceded to the Company's
adverse  development  cover amounted to $46.5 million.  Excluding the benefit of
the adverse development cover, the claims and claims expense ratio in 1999 would
have been 92.6%.

Trenwick America Re's claims and claims expense ratio was 78.3% in 1999 compared
to 60.5% in 1998 and 57.6% in 1997. The increase in Trenwick America Re's claims
and claims  expense ratio in 1999 is primarily  due to the reasons  described in
the paragraph above.

Trenwick  International's  claims  and  claims  expense  ratio was 74.9% in 1999
compared to 67.0% in 1998. The increase was due primarily to catastrophe  losses
associated  with the European  winter storms that occurred in the fourth quarter
of 1999.

Trenwick's  expense ratio,  which is the ratio of policy  acquisition  costs and
underwriting  expenses to net earned  premiums as determined in accordance  with
GAAP, increased in 1999 to 41.1% compared to 39.9% in 1998 and 38.9% in 1997. As
was the case in 1998,  the overall  increase in the expense ratio  reflected the
continued increase in costs associated with Trenwick America Re. During 1999 and
1998, insurance companies continued to increase commissions on business ceded to
reinsurers.  The increase  associated  with  domestic  reinsurance  business was
partially  offset by a reduction in Trenwick  International's  expense ratio and
the inclusion of  Canterbury  Financial  and  Chartwell  Managing  Agents in the
fourth quarter of 1999 whose underwriting  results, in aggregate,  carry a lower
expense ratio.  Trenwick's domestic  reinsurance expense ratio in 1999 was 45.2%
compared to 41.3% in 1998 and 38.9% in 1997.  Trenwick  International's  expense
ratio was 35.2% in 1999 compared to 36.4% in 1998.




                                       4
<PAGE>

Trenwick  America Re's statutory  combined  ratios for 1999,  1998 and 1997 were
165.5%,  102.3% and 95.9%  respectively.  Trenwick  America Re's 1999  statutory
combined  ratio  includes the results of  Chartwell  Reinsurance  Company,  both
before and after its  acquisition by Trenwick.  Trenwick  America Re's statutory
combined ratios were 50.9 percentage  points worse, 2.2 percentage points better
and 6.8  percentage  points  better,  respectively,  than the  weighted  average
statutory  combined  ratios for all  reinsurance  companies which reported their
results to the Reinsurance  Association of America ("RAA") in those periods. The
statutory combined ratios for this group of reinsurance  companies in 1999, 1998
and 1997 were 114.6%,  104.5% and 102.7%,  respectively.  The statutory combined
ratios as reported to the RAA by those companies, including Trenwick America Re,
which  primarily  accept  business  from brokers,  for 1999,  1998 and 1997 were
112.3%, 106.2% 104.6%, respectively.

Consolidated Results of Operations
Year Ended December 31, 1999 Compared With Year Ended December 31, 1998
Revenues
Total revenues for the year ended  December 31, 1999  increased  26.7% to $394.3
million,  compared to $311.3 million for the comparable period in 1998. Included
in  Trenwick's  consolidated  results  of  operations  for 1999 are  Chartwell's
operating results since its merger with Trenwick on October 27, 1999.

Net Premiums Earned
Net premiums  earned for the year ended  December 31, 1999 were $325.1  million,
compared to $245.6 million in 1998, a 32.4% increase compared to the same period
in 1998. This increase reflects the inclusion of Chartwell's  business since its
acquisition  on October 27, 1999 and an  increase  in business  underwritten  by
Trenwick International,  offset in part by a decline in business underwritten by
Trenwick America Re.

Net Investment Income
Trenwick's  net  investment  income was $66.4  million in 1999 compared to $56.3
million in 1998. The overall increase in investment income in 1999 is due to the
continued growth in Trenwick's  invested asset base resulting primarily from the
acquisition of Chartwell's business,  offset by decreases resulting from funding
requirements  for the repurchase of Trenwick's  common stock,  reduced  business
written by Trenwick  America Re and lower interest rates on the  reinvestment of
securities at maturity.  Pre-tax yields on Trenwick's invested assets, excluding
equity  securities,  were 6.2% in 1999 compared to 6.4% in 1998. This decline in
1999 resulted primarily from the reinvestment of approximately $397.2 million of
maturing securities at lower yields. In 1999, maturing securities included $24.6
million  of  principal  repayments   associated  with  Trenwick's  portfolio  of
mortgage-backed and asset-backed securities,  compared to $32.0 million in 1998.
Principal  repayments  decreased in 1999 due to the  increase in interest  rates
from 1998.

Net Realized Investment Gains
Trenwick  realized  net  investment  gains of $1.9 million or $.16 per basic and
diluted  share for 1999  compared to $9.0  million or $.77 per basic and diluted
share for the same  period in 1998.  Included  in 1999 net  realized  investment
gains were $5.2 million of losses  related to the  write-down to net  realizable
value of certain debt securities in Trenwick's portfolio.



                                       5
<PAGE>

Other Income and Equity Earnings of Investees
For the years ended December 31, 1999 and 1998, other income was $.7 million and
$.4 million, respectively,  which consisted of foreign transaction gains. Equity
earnings of investees was $.2 million in 1999.

Claims and Claims Expenses Incurred
Trenwick's  principal expense,  claims and claims expenses incurred,  was $254.5
million for the year ended  December  31,  1999,  a 66.2%  increase  compared to
$153.1  million for the  comparable  period in 1998. The increase is principally
attributable  to an  increase  in premium  volume  following  the  inclusion  of
Chartwell's  business  since its  acquisition  on October 27,  1999.  Claims and
claims expenses associated with Chartwell's  business amounted to $42.7 million.
In  addition,  claims and claims  expense  increased as a result of increases in
estimates  of prior  accident  year  claims of $14.6  million in 1999 and claims
arising from catastrophe losses in 1999 of $12.9 million.

Policy Acquisition Costs
Policy  acquisition  costs,  which vary directly with premium volume and consist
primarily of commissions  paid to ceding companies and agents and brokerage fees
paid to  intermediaries,  less  commissions  received on business ceded to other
reinsurers, were $96.1 million for the year ended December 31, 1999, compared to
$74.2 million for the same period in 1998. Policy acquisition costs expressed as
a percentage of net earned premiums (the  acquisition  expense ratio)  decreased
slightly to 29.6% in 1999 from 30.2% in 1998.

Underwriting Expenses
In 1999,  Trenwick recorded  underwriting  expenses of $37.4 million compared to
$23.8 million in 1998. The reason for the increase in underwriting  expenses was
due to the inclusion of Chartwell's  business  since its  acquisition on October
27,  1999  and  certain  non-recurring   expenses,   including  severance  costs
associated with the acquisition of Chartwell.  As a result, Trenwick recorded an
underwriting  loss, which is net earned premiums less claims and claims expenses
incurred,  policy acquisition costs and underwriting  expenses, of $62.9 million
in 1999 compared to an underwriting loss of $5.6 million in 1998.

Other Expenses
Other expenses,  which include  amortization of goodwill and other  intangibles,
general and administrative  expenses,  interest expense and minority interest in
subsidiary  trust  were  $27.5  million  for the year ended  December  31,  1999
compared to $17.2 million for the same period in 1998. The increase reflects the
addition of goodwill and  increases in general and  administrative  expenses and
interest expense in conjunction with the acquisition of Chartwell.

Income Before Income Taxes
Trenwick  incurred a net loss before  income taxes of $21.2 million for the year
ended  December  31, 1999  compared to net income of $43.0  million for the same
period in 1998. The net loss occurred for the reasons described above.

Income Taxes
The income tax benefit for the year ended  December  31, 1999 was $10.2  million
compared  with a provision  for income taxes of $8.2 million for the same period
in 1998. The effective tax rate was 48% and 19% for the years ended December 31,
1999 and 1998,  respectively.  The main reason for the  increase  in  Trenwick's
effective  tax  rate  above  the  statutory  rate  of 35% in 1999  was the  loss
experienced  by Trenwick in 1999,  which  limited the benefits  recognizable  on
investments in tax-exempt securities.  The principal factor in the decline below
the  statutory  rate of 35% for 1998  results  from the  benefit  recognized  on
investments in tax-exempt securities.



                                       6
<PAGE>

As of December 31, 1999,  Trenwick has U.S. net operating loss  carryforwards of
$53.2 million  available to offset future regular  taxable income until 2019. Of
the total net operating  loss  carryforward,  $15.7 million was generated by The
Insurance  Corporation  of  New  York  (INSCORP)  prior  to its  acquisition  by
Chartwell in 1995 and is limited by Section 382 of the Internal  Revenue Code to
an annual amount of $3.5 million to offset future taxable income each year.

During 1999,  Trenwick recorded a valuation allowance of $24.0 million to reduce
its deferred tax asset. The valuation  allowance is necessary because sufficient
uncertainty  exists  regarding the  realizability of certain foreign tax credits
and other  deferred  tax  assets  related  to the  excess  tax basis of  foreign
subsidiaries.  Any reduction in the valuation  allowance  will be offset against
goodwill.

Net Income
Trenwick  incurred a net loss of $11.0  million for the year ended  December 31,
1999 compared with a net profit of $34.8 million for the comparable 1998 period.
The basic  loss per  share  was $.94 for the year  ended  December  31,  1999 as
compared to basic net income of $2.99 per share for the same period in 1998. The
diluted  loss per share was $.94 per share  compared  to  diluted  net income of
$2.95 per share for the year ended December 31, 1998.

Year Ended December 31, 1998 Compared With Year Ended December 31, 1997
Revenues
Total revenues for the year ended  December 31, 1998  increased  29.2% to $311.3
million,  compared to $240.9 million for the comparable period in 1997. Included
in  Trenwick's   consolidated  results  of  operations  for  1998  are  Trenwick
International's operating results since its acquisition on February 27, 1998.

Net Premiums Earned
Net premiums  earned for the year ended  December 31, 1998 were $245.6  million,
compared to $190.2 million in 1997, a 29.1% increase compared to the same period
in 1997.  This  increase  reflects  the  inclusion  of Trenwick  International's
business since its acquisition on February 27, 1998.

Net Investment Income
Trenwick's  net  investment  income was $56.3  million in 1998 compared to $48.4
million in 1997.  The overall  increase in investment  income in 1998 was due to
the continued growth in Trenwick's  invested asset base resulting primarily from
the  acquisition  of Trenwick  International  offset in part by the  decrease in
Trenwick  America Re's invested asset base resulting from sales of approximately
$88.1 million of securities to fund the  acquisition  of Trenwick  International
and the  repurchase of  Trenwick's  common  stock.  Trenwick's  pre-tax yield on
invested assets,  excluding equity securities,  was 6.4% in 1998, unchanged from
1997.

Net Realized Investment Gains
Trenwick  realized  net  investment  gains of $9.0 million or $.77 per basic and
diluted share for 1998 compared to $2.3 million or $.20 per basic share and $.19
per diluted share for the same period in 1997.






                                       7
<PAGE>


Other Income
Other income was $.4 million for the year ended  December  31, 1998  compared to
$.01 million for the same period in 1997. This increase was due to the inclusion
of Trenwick International's foreign transaction gains and losses.

Claims and Claims Expenses Incurred
Trenwick's  principal  expense,  claims and claims expenses  incurred was $153.1
million for the year ended  December  31,  1998,  a 39.7%  increase  compared to
$109.6 million for the comparable  period in 1997. The increase was  principally
attributable  to  the  increase  in  premiums  written  by  Trenwick  due to the
inclusion of Trenwick International's underwriting results since its acquisition
on February 27, 1998.

Policy Acquisition Costs
Policy  acquisition  costs,  which vary directly with premium volume and consist
primarily of commissions  paid to ceding companies and agents and brokerage fees
paid to  intermediaries,  less  commissions  received on business ceded to other
reinsurers, were $74.2 million for the year ended December 31, 1998, compared to
$58.5 million for the same period in 1997. Policy acquisition costs expressed as
a percentage of net earned premiums (the  acquisition  expense ratio)  decreased
slightly to 30.2% in 1998 from 30.8% in 1997.

Underwriting Expenses
In 1998,  Trenwick recorded  underwriting  expenses of $23.8 million compared to
underwriting  expenses of $15.4 million  in 1997. The reason for the increase in
underwriting  expenses was due to the inclusion of higher  expenses  relating to
the business of Trenwick  International  since its  acquisition  on February 27,
1998. As a result,  Trenwick recorded an underwriting  loss, which is net earned
premiums less claims and claims expenses incurred,  policy acquisition costs and
underwriting  expenses,  of $5.6  million in 1998  compared  to an  underwriting
profit of $6.6 million in 1997.

Other Expenses
Other  expenses  include  $1.4  million of  amortization  of goodwill  and other
intangibles,  $7.2  million of general  and  administrative  expenses  and $18.9
million of interest  expense and minority  interest in subsidiary  trust for the
year ended December 31, 1999 compared to $33,000 of amortization of goodwill and
other intangibles, $3.5 million of general and administrative expenses and $13.7
million for interest  expense and minority  interest in subsidiary trust for the
same  period in 1998.  The  increase  reflects  the  addition  of  goodwill  and
increases  in  general  and  administrative  expenses  and  interest  expense in
conjunction with the acquisition of Chartwell.

Income Before Income Taxes and Extraordinary Item
Net income  before  income taxes  decreased to $43.0  million for the year ended
December  31, 1998  compared to $47.5  million for the same period in 1997.  The
decrease resulted  primarily from after-tax  charges of $5.7 million  associated
with catastrophe losses,  including Hurricanes Mitch and Georges.  There were no
material catastrophe losses included in the results for 1997.

Income Taxes
The provision for income taxes for the year ended
December 31, 1998 decreased to $8.2 million  compared with $11.2 million for the
same period in 1997.  The effective tax rate was 19% and 24% for the years ended
December 31, 1998 and 1997,  respectively.  The principal  factor in the decline
below the  statutory  rate of 35% for both  periods  resulted  from the  benefit
recognized on investments in tax-exempt securities.




                                       8
<PAGE>

Extraordinary Loss
Trenwick incurred an extraordinary loss, net of the related tax benefit, of $1.0
million in 1997 in connection with the redemption of outstanding debt.

Net Income
Trenwick  realized a net profit of $34.8 million for the year ended December 31,
1998 compared with a net profit of $35.3 million for the comparable 1997 period.
Basic  earnings per share  decreased  1.3% to $2.99 per share for the year ended
December 31, 1998 from $3.03 per share for the same period in 1997.  Diluted net
income per share  decreased 2.0% to $2.95 per share from $3.01 per share for the
year ended December 31, 1998.

Investments
Trenwick's investment objective is to fund policyholder and other liabilities in
a  manner  that  enhances   shareholder  value,   subject  to  appropriate  risk
constraints.  Trenwick seeks to meet this investment  objective through a mix of
investments  that reflect the  characteristics  of the liabilities they support;
diversify the types of investment risks by interest rate, liquidity,  credit and
equity  price risk;  and  achieve  asset  diversification  by  investment  type,
industry,  issuer and geographic location.  Trenwick regularly projects duration
and  cash  flow   characteristics  of  its  liabilities  and  makes  appropriate
adjustments in its  investment  portfolios.  At December 31, 1999,  Trenwick had
investments,  cash and cash  equivalents  of $1.7 billion,  an increase of 74.0%
compared  to investments,  cash and cash equivalents of $1.0 billion at December
31, 1998. This increase resulted principally from the acquisition of Chartwell's
invested asset base. All debt and equity investments are classified as available
for sale and  reported at fair value with the  unrealized  gain or loss,  net of
income taxes,  reported in other comprehensive  income.  During 1999, the market
value of Trenwick's debt and equity investments  decreased by $41.7 million as a
result  of an  overall  increase  in  interest  rates,  the  effect of which was
amplified by the increase in 1999 of the size of Trenwick's asset base.

During 1999,  the proceeds from sales and  maturities of taxable and  tax-exempt
securities of $769.4  million were invested by Trenwick  America Re primarily in
tax-exempt   securities   in  the  amount  of  $69.6  million  and  by  Trenwick
International in debt securities issued by the British  Government in the amount
of $138.2  million.  Trenwick also purchased  mortgage-backed  and  asset-backed
securities in the amount of $6.6 million,  U.S. government and agency securities
of $31.4 million,  securities of other governments of $60.6 million,  investment
grade  corporate  bonds of $44.7 million and high yield corporate bonds of $29.2
million. In addition, Trenwick purchased and disposed of certificates of deposit
in the amount of $261.6  million  during 1999.  Also in 1999,  $29.7  million of
equities were purchased.

Trenwick's debt securities  consisted  primarily of investment grade securities,
with 79% having a quality  rating of Aa or better at  December  31,  1999.  High
yield,  or  non-investment  grade  debt  securities  carry  a  rating  of  below
BBB-/Baa3.  These securities,  along with unrated  securities,  represented less
than 2% of the  portfolio  at  December  31,  1999 and .5% of the  portfolio  at
December 31, 1998.



                                       9
<PAGE>


The average  maturity of Trenwick's debt securities at December 31, 1999 was 6.8
years  compared to 5.7 years at December  31, 1998 and 6.2 years at December 31,
1997.   The   shortening   during  1998   reflected  the  addition  of  Trenwick
International's  portfolio  which  had a  much  shorter  average  maturity.  The
lengthening  during 1999 reflects the longer  average  maturity of the Chartwell
portfolio along with the 1999 duration  extension of the Trenwick  International
portfolio.

Trenwick has not invested in derivative  financial  instruments such as futures,
forward contracts,  swaps,  options or other financial  instruments with similar
characteristics  such as  interest  rate  caps or  floors  and  fixed-rate  loan
commitments. Trenwick's portfolio includes market sensitive instruments, such as
mortgage-backed  and  asset-backed  securities,  which amounted to approximately
$288.5 million at December 31, 1999 or 16.5% of cash and invested assets.  These
investments  are  classified  as available for sale and are not held for trading
purposes.  There are various  categories  of  mortgage-backed  and  asset-backed
securities  that are  subject  to  different  degrees  of risk from  changes  in
interest rates and, for those  mortgage-backed and asset-backed  securities that
are   not   agency-backed,   defaults.   Approximately   60.6%   of   Trenwick's
mortgage-backed  and asset-backed  securities holdings were backed by government
agencies,  such as GNMA,  FNMA and  FHLMC,  at  December  31,  1999 and 45.8% at
December 31, 1998. The principal risks inherent in holding  mortgage-backed  and
asset-backed  securities are prepayment and extension  risks related to dramatic
decreases  and  increases  in interest  rates,  resulting  in the  repayment  of
principal from the underlying  mortgages either earlier or later than originally
anticipated.   At  December   31,   1999,   approximately   .3%  of   Trenwick's
mortgage-backed   and   asset-backed   securities   holdings  were  invested  in
mortgage-backed and asset-backed  securities that are subject to more prepayment
and extension risk (such as interest- or principal-only strips) than traditional
mortgage-backed  and  asset-backed  securities.  At December 31,  1998,  no such
securities were held.

Liquidity and Capital Resources
Cash Flows
Trenwick is a holding company whose principal  assets are its investments in the
common stock of its operating  subsidiaries.  As a holding  company,  Trenwick's
principal  source of funds  consists of  permissible  dividends,  tax allocation
payments  and  other  statutorily   permissible   payments  from  its  operating
subsidiaries  together  with  income  on  the  holding  company's   fixed-income
portfolio.  Trenwick's principal uses of cash are dividends to its stockholders,
servicing its debt  obligations and repurchases of its own common stock when the
pricing is  attractive.  Trenwick's  operating  subsidiaries  receive  cash from
premiums,  investment income and proceeds from sales and maturities of portfolio
investments.  They utilize cash to pay claims,  purchase  their own  reinsurance
protections,  meet operating and capital expenses and purchase  fixed-income and
equity securities.

Cash used in Trenwick's  operating activities in 1999 was $52.3 million compared
to cash provided by Trenwick's operating activities of $37.9 million in 1998 and
$47 million in 1997. The reduction in cash flow from  operations in 1999 was due
primarily  to a  cash  payment  of $56  million  in  premium  payments  for  the
reinsurance  policy which provides  protection  against  adverse  development of
Chartwell's  reserves  following  its  acquisition  by  Trenwick  and an overall
increase in claims and claims expenses paid.

In 1999, cash used for financing  activities was $24.4 million  compared to cash
provided  by  financing  activities  of  $29.0  million  in 1998.  Cash  used by
financing  activities in 1999 includes the repayment of long-term  debt of $48.4
million and the  repurchase  of common stock of $44.6  million,  offset by $94.5
million of borrowings under a credit facility established in 1999. Cash provided
by  financing  activities  in 1998  included  proceeds  from the issuance of $75
million  principal  amount of 6.70% Senior Notes partially offset by repurchases
of common stock of  approximately  $34.9  million.  Included in cash provided by
financing  activities  in  1997  was  $110  million  from  the  issuance  of the
Subordinated  Capital Income  Securities,  partially offset by the redemption of
convertible debt of approximately $47 million.



                                       10
<PAGE>

Trenwick's  current  liquidity  objectives  are to maximize the use of available
cash to fund ongoing operating needs, pay shareholder  dividends,  strategically
invest in core businesses and meet common stock  repurchase  objectives.  During
1999, net cash generated from investing,  financing and operating activities was
used to pay $44.6 million for common stock  repurchases and pay $12.8 million of
dividends to shareholders.  In 1998, net cash generated by investing,  financing
and  operating  activities  was  used to pay  $34.9  million  for  common  stock
repurchases and pay $11.7 million of dividends to shareholders.

Dividends
Trenwick paid a quarterly dividend of $.26 per share of common stock in 1999 and
$.25 per share of common stock in 1998.  Trenwick's  Board of Directors  reviews
Trenwick's common stock dividend each quarter.  Among the factors  considered by
the Board of Directors in determining the amount of each dividend are Trenwick's
results  of  operations   and  the  capital   requirements,   growth  and  other
characteristics of its businesses.

Financings, Financing Capacity and Capitalization
Substantially all of Trenwick's  borrowings and financings are conducted through
Trenwick  Group Inc.  Trenwick  continually  monitors  existing and  alternative
financing sources to support Trenwick's capital and liquidity needs,  including,
but  not  limited  to,  debt  issuance,  preferred  or  common  stock  issuance,
intercompany borrowings and pledging or selling of assets.

Trenwick's  total debt to capital  ratio  (total debt  divided by total debt and
shareholders'   equity,   adjusted   for   unrealized   gains   or   losses   on
available-for-sale investment securities) was 43% at the end of 1999, 36% at the
end of 1998 and 25% at the end of 1997. The increases in 1999 and 1998 primarily
reflect the incurrence of  indebtedness  in connection  with the  acquisition of
Trenwick International and the assumption of indebtedness in connection with the
Chartwell acquisition.

On November 24, 1999, Trenwick entered into a $400 million credit agreement with
various lending institutions, The Chase Manhattan Bank, as Administrative Agent,
First Union  National Bank, as  Syndication  Agent,  and Fleet National Bank, as
Documentation  Agent.  This new credit  facility  provides  for a $170  million,
364-day  revolving  credit  facility  with  an  option  to pay  out  outstanding
borrowings  under such facility over the four years  following the expiration of
the 364-day period. In addition, the credit facility provides for a $230 million
five year, Lloyd's letter of credit facility,  with a one year automatic renewal
option. The applicable  interest rate on borrowings under the credit facility is
currently 1.3% above the London  interbank  offered rate or The Chase  Manhattan
Bank prime commercial lending rate.

The credit facility's representations,  warranties and covenants are typical for
transactions of this type and include limitations based upon Trenwick's leverage
ratio,  interest  coverage  ratio,  combined  surplus  and  risk-based  capital.
Trenwick and the banks party to the credit facility executed an amendment to the
credit  facility,  dated as of December 31, 1999,  reducing the required minimum
consolidated  tangible  net worth of Trenwick  from $325 million to $290 million
until June 30, 2000.



                                       11
<PAGE>

In  addition  to the credit  facility,  Trenwick  has   outstanding  $75 million
aggregate  principal amount of 6.70% Senior Notes,  which are due April 1, 2003.
Interest  is  payable  semi-annually  on  April 1 and  October  1 of each  year;
interest payments commenced on October 1, 1998.
The notes are not subject to  redemption  prior to maturity.  They are unsecured
obligations  and rank  senior in right of  payment  to all  existing  and future
subordinated indebtedness of Trenwick.

Trenwick's  long-term debt  obligations  also include 8.82% Junior  Subordinated
Deferrable  Interest  Debentures held by Trenwick  Capital Trust I in respect of
the $110 million in 8.82%  Subordinated  Capital Income Securities issued by the
Trust.  Under the  terms of the  debentures,  Trenwick  is not  restricted  from
incurring indebtedness, but is subject to limits on its ability to incur secured
indebtedness for borrowed money.

Upon  consummation of the acquisition of Chartwell in 1999,  Trenwick became the
successor obligor under Chartwell's Contingent Interest Notes due June 30, 2006.
The Contingent Interest Notes were issued in an aggregate principal amount of $1
million, which accrues interest at a rate of 8% per annum,  compounded annually.
The  interest is not payable  until the  maturity or earlier  redemption  of the
Contingent  Interest Notes. In addition,  the Contingent  Interest Notes entitle
their holders to receive at maturity,  in proportion to the principal  amount of
the Contingent  Interest Notes held by them, an aggregate of from $10 million up
to $55 million in contingent interest. The amount of contingent interest payable
under the Contingent Interest Notes is dependent upon the level of loss and loss
adjustment  expense  reserves  related to business  written by INSCORP  prior to
1996. Settlement of the Contingent Interest Notes may be made by payment of cash
or, under  certain  specified  conditions,  by delivery of shares of  Trenwick's
common stock.

Trenwick also assumed  Chartwell's 10.25% Senior Notes due 2004 upon the closing
of the  acquisition.  As of December 31, 1999, $40.1 million in principal amount
of the Senior Notes were  outstanding.  On March 1, 2000,  Trenwick redeemed the
remaining  outstanding  Senior Notes at a redemption price of 102.56% of the par
value of the notes.

Common Stock Transactions
In May 1997,  Trenwick's  Board of Directors  authorized  the  repurchase of one
million shares of common stock.  In September 1998,  August 1999,  November 1999
and  December  1999,  the  Board  of  Directors  authorized  the  repurchase  of
additional  shares,  increasing the total number of shares of common stock which
Trenwick  could purchase  under the stock  repurchase  program to 4.6 million at
purchase prices not to exceed Trenwick's book value.  Under the stock repurchase
plan,  Trenwick  repurchased  2,176,200  shares  of  common  stock  at a cost of
approximately  $46.6 million in 1999 and an additional  829,300 shares of common
stock at a cost of  approximately  $13.7  million in January of 2000.  Since May
1997, Trenwick has purchased an aggregate of 3,276,700 shares of common stock at
a cost of approximately $81.9 million under its stock repurchase program.

Trenwick issued 65,985 shares of common stock in 1999, 82,889 shares in 1998 and
9,782 shares in 1997 pursuant to employee benefit plans.




                                       12
<PAGE>

Restrictions on Certain Payments within Trenwick
Because Trenwick's operations are conducted through its operating  subsidiaries,
Trenwick is dependent upon the ability of its operating subsidiaries to transfer
funds,  principally in the form of cash dividends,  tax reimbursements and other
statutorily  permissible  payments. In addition to general legal restrictions on
payments of dividends and other distributions to shareholders  applicable to all
corporations,   Trenwick's   insurance   subsidiaries  are  subject  to  further
regulations that, among other things, restrict the amount of dividends and other
distributions that may be paid to their parent corporations. Management believes
that current levels of cash flow from  operations and assets held at the holding
company  level,  together with approval of one or more  extraordinary  dividends
from Trenwick's  operating  subsidiaries,  will provide Trenwick with sufficient
liquidity to meet its operating  needs in the  short-term  (over the next twelve
months).  Since the ability of Trenwick to meet its obligations in the long-term
(beyond  such twelve  month  period) is  dependent  upon such  factors as market
changes,  insurance regulatory changes and economic conditions, no assurance can
be given  that  the  available  net cash  flow  will be  sufficient  to meet its
operating  needs.  Trenwick expects that, in order to repay the principal amount
of certain currently outstanding  indebtedness at maturity or otherwise, it will
be required  to seek  additional  financing  or engage in asset sales or similar
transactions.  There can be no assurance  that  sufficient  funds for any of the
foregoing purposes would be available to Trenwick at such time.

Under the  applicable  provisions of the insurance  holding  company laws of the
states of domicile of most of Trenwick's U.S. insurance companies, the insurance
companies may only pay dividends  without the approval of the  applicable  state
insurance regulator if such dividends, together with other dividends paid within
the  preceding  twelve  months,  are  less  than the  greater  of (i) 10% of the
insurer's  policyholders'  surplus as of the end of the prior  calendar  year or
(ii) the insurer's  statutory net income,  excluding realized capital gains, for
the  prior  calendar  year.  As a further  restriction,  the  maximum  amount of
dividends  most U.S.  insurers  may pay is limited to its earned  surplus,  also
known as its unassigned  funds. Any dividend in excess of the amount  determined
pursuant to the foregoing  formula would be characterized  as an  "extraordinary
dividend" requiring the prior approval of the state insurance regulator.

Under New York law, which is applicable to two of Trenwick's  insurance  company
subsidiaries,  INSCORP and ReCor  Insurance  Company Inc.  (ReCor),  the maximum
ordinary dividend payable in any twelve month period without the approval of the
New York Insurance Department is the lesser of (i) 10% of policyholders' surplus
as shown on the  company's  last annual  statement or any more recent  quarterly
statement or (ii) the company's  adjusted net  investment  income.  Adjusted net
investment  income is defined  as net  investment  income for the twelve  months
preceding  the  declaration  of the  dividend  plus the  excess,  if any, of net
investment  income  over  dividends  declared or  distributed  during the period
commencing  thirty-six  months prior to the  declaration or  distribution of the
current  dividend and ending twelve months prior thereto.  In any case, New York
law permits the payment of an ordinary  dividend by an insurer or reinsurer only
out of earned surplus.

In addition to the foregoing limitations,  the New York Insurance Department, as
is its practice in any change of control situation,  required Trenwick to commit
to preclude the acquired New  York-domiciled  insurers,  INSCORP and ReCor, from
paying any dividends for two years after the merger with Chartwell without prior
regulatory approval.  The foregoing restriction will expire on October 27, 2001.
Neither INSCORP nor ReCor paid any dividends in 1997, 1998 or 1999.



                                       13
<PAGE>

Moreover, insurance holding company laws generally provide that, notwithstanding
the  receipt of any  dividend  from a  subsidiary  insurer,  an insurer may make
dividend  payments  to its parent  only to the extent it is  permitted  to do so
under its applicable dividend restrictions.
In other words,  the ability of a subsidiary  insurer to pay  dividends  without
restriction  may be impaired if its parent insurer cannot pay dividends  without
restriction.

The maximum  dividend  permitted  by law may not be  indicative  of an insurer's
actual ability to pay dividends,  which may be constrained by business and other
regulatory  considerations,  such as the impact of dividends  on surplus,  which
could  affect an  insurer's  ratings  or  competitive  position,  the  amount of
premiums  that  can  be  written  and  the  ability  to  pay  future  dividends.
Furthermore,  beyond the limits described in the preceding paragraph,  insurance
regulatory  authorities  often  have the  discretion  to limit  the  payment  of
dividends by insurance companies domiciled in their jurisdictions.

In 2000, of Trenwick's U.S. insurance subsidiaries,  only Dakota Specialty could
pay a dividend or other  distribution  without prior  approval of the applicable
insurance regulatory  authority.  In 2000, Dakota Specialty could pay a dividend
of $2.8 million  without prior approval.  During 1999,  1998 and 1997,  Trenwick
America Re paid  dividends of $53.4  million,  $30.1  million and $8.3  million,
respectively.  Chartwell Reinsurance paid dividends of $30.3 million in 1999 and
$3.0 million in 1997.  Chartwell  Reinsurance did not pay any dividends in 1998.
None of Trenwick's other U.S. insurance subsidiaries paid any dividends in 1999,
1998 or 1997.

Under the applicable  laws of the United  Kingdom,  Trenwick  Holdings  Limited,
Chartwell   Holdings  Limited  and  their   respective   subsidiaries  may  make
shareholder  distributions  only  from  accumulated  realized  profits,  net  of
accumulated  realized losses. In addition,  under the U.K.  Insurance  Companies
Act, Trenwick International is not permitted to make any distribution that would
reduce its net assets below the required  minimum margin of solvency  which,  as
determined under the U.K. Financial Service  Authority's rules, is approximately
$16.7 million as of December 31, 1999.  Trenwick  International must also notify
the U.K.  Financial  Services  Authority  of any  proposal  to  declare or pay a
dividend  on any of its share  capital.  Under  Lloyd's  regulations,  Chartwell
Managing Agents is not permitted to make any  distribution  that would cause its
assets to fall below any of Chartwell  Managing  Agents' share capital,  minimum
net current asset margin or minimum net asset  margin.  As of December 31, 1999,
the highest of the three tests required  Chartwell  Managing  Agents to maintain
approximately $1.1 million of capital.

Reinsurance
Trenwick's operating subsidiaries purchase reinsurance to reduce its exposure to
catastrophe  claims and the  frequency  and  severity  of claims in all lines of
business.  In 1999, 1998 and 1997,  Trenwick America Re's  reinsurance  treaties
consisted  principally of an excess of loss treaty for its facultative  casualty
business and property catastrophe  reinsurance treaties.  In addition,  Trenwick
America  Re  purchased  an annual  aggregate  excess of loss  ratio  treaty  for
casualty business  effective  January 1, 1999.  Except for property  catastrophe
reinsurance  treaties,  these  coverages were not renewed  effective  January 1,
2000. Trenwick International and Chartwell Managing Agents, as is customary with
companies  operating in the London market and at Lloyd's,  buy larger amounts of
reinsurance to protect  themselves.  Reinsurance and retrocessional  coverage is
customized for each class of business.  Canterbury  Financial purchased specific
reinsurance  programs for each of the  programs  underwritten  by its  insurance
companies.



                                       14
<PAGE>


As part of the merger with  Trenwick,  Chartwell  purchased,  at the time of the
closing  of the  transaction,  a  reinsurance  policy  providing  for up to $100
million  in  coverage  in  order to  indemnify  Trenwick  against  unanticipated
increases in Chartwell's reserves for business written on or before the date the
merger was  completed.  The  reinsurance  policy  applies to all of  Chartwell's
business,  including  its  operations  at Lloyd's.  In addition,  as part of the
merger, Chartwell commuted several aggregate stop-loss reinsurance treaties.

Reinsurance  agreements  provide for recovery of a portion of certain claims and
claims expenses from  reinsurers.  Trenwick remains liable in the event that the
reinsurer is unable to meet its  obligation;  however,  Trenwick  holds  partial
collateral under these agreements.

Regulatory Matters
Trenwick and its domestic subsidiaries are subject to regulatory oversight under
the  insurance  statutes  and  regulations  of the  jurisdictions  in which they
conduct  business,  including  all  states of the  United  States and the United
Kingdom.  These  regulations  vary from  jurisdiction  to  jurisdiction  and are
generally  designed to protect ceding insurance  companies and  policyholders by
regulating   Trenwick's   financial  integrity  and  solvency  in  its  business
transactions  and  operations.  Many of the insurance  statutes and  regulations
applicable to Trenwick's  subsidiaries relate to reporting and enable regulators
to closely monitor their  performance.  Reports typically required the inclusion
of information  concerning  Trenwick's capital structure,  ownership,  financial
condition and general business operations.

Trenwick  International  is subject to the  regulatory  authority  of the United
Kingdom  Financial  Services  Authority.  Both  Chartwell  Managing  Agents  and
Trenwick's  dedicated  Lloyd's  underwriting  entities,  as a  Lloyd's  managing
general  agent and  Lloyd's  corporate  members,  respectively,  are  subject to
regulation and supervision by the Council of Lloyd's.  Lloyd's  operates under a
self-regulatory  regime  under  the  Lloyd's  Act 1982 and has the power to set,
interpret and change the rules which govern the operation of the Lloyd's market,
subject to regulation for solvency purposes by the Financial Services Authority.
Lloyd's  prescribes,  in respect of its managing  agents and corporate  members,
certain minimum standards relating to their management and control, solvency and
various other requirements.  In addition,  Lloyd's imposes  restrictions against
persons  becoming  controllers  and major  shareholders  of managing  agents and
corporate members without the consent of Lloyd's first having been obtained. The
United Kingdom  government has established the Financial Services Authority as a
single  regulator  to  supervise  securities,  banking and  insurance  business,
including  Lloyd's.  When the  Financial  Services  and Market Bill becomes law,
probably  in  late  2000,  the  Financial  Services  Authority  will  have  wide
authorization  and  intervention  powers in relation to Lloyd's.  A consultation
process has commenced in relation to Lloyd's regulatory framework.

The  National   Association  of  Insurance   Commissioners  (NAIC)  has  adopted
Risk-Based  Capital  (RBC)  requirements  for property  and  casualty  insurance
companies to evaluate the adequacy of statutory  capital and surplus in relation
to investment  and insurance  risks such as asset  quality,  asset and liability
matching,  loss reserve adequacy and other business factors.  The RBC formula is
used by state insurance regulators as an early warning tool to identify, for the
purpose of initiating  regulatory action,  insurance  companies that potentially
are inadequately  capitalized.  In addition, the formula defines minimum capital
standards that  supplement  the system of low fixed minimum  capital and surplus
requirements on a state-by-state basis. Regulatory compliance is determined by a
ratio of the  enterprise's  regulatory  total adjusted capital to its authorized
control level RBC, as defined by the NAIC.  Enterprises  below specific  trigger
points or ratios are classified  within certain  levels,  each of which requires
specific  corrective  action. The ratios of Total Adjusted Capital to Authorized
Control  Level  RBC for  each of  Trenwick's  United  States  insurance  company
subsidiaries  exceeded all of the RBC trigger points at December 31, 1999,  1998
and 1997.



                                       15

<PAGE>


In March  1998,  the NAIC  adopted  the  Codification  of  Statutory  Accounting
Principles  (Codification).  The Codification,  which is intended to standardize
regulatory  accounting and reporting for the insurance industry,  is proposed to
be implemented  January 1, 2001. The  Codification  provides  guidance for areas
where  statutory  accounting  has been  silent  and  changes  current  statutory
accounting in some areas. However, statutory accounting principles will continue
to be established by individual  state laws and permitted  practices.  Effective
January 1, 2001,  Connecticut,  New York, Minnesota and North Dakota, the states
of  domicile  of  Trenwick's  U.S.  insurance  subsidiaries,  are  adopting  the
Codification.  It is uncertain what effect adoption of the  Codification for the
preparation of the statutory  financial  statements of Trenwick's U.S. insurance
subsidiaries would have on those statutory financial statements.

Quantitative and Qualitative Disclosure About
Market Risk
The following  sections  address the  significant  market risks  associated with
Trenwick's business activities as of the years ended December 31, 1999 and 1998.
The 1999 risk analysis  differs from that of 1998 because it includes the assets
and liabilities of the Chartwell  group. The 1998 comparative data only reflects
Trenwick  information.  Trenwick's  primary market risk  exposures are:  foreign
currency  exchange  risk,  in  particular  the U.S.  dollar to the British pound
sterling;  interest rate risk on fixed and variable rate U.S. dollar and British
pound sterling  denominated  short and long-term  instruments;  and equity price
risk.

With respect to the Trenwick investment portfolio,  the risk management strategy
is to place its  investments  with high credit quality  issuers and to limit the
amount of credit exposure with respect to particular  ratings categories and any
one issuer.  Trenwick selects investments with characteristics such as duration,
yield,  currency and  liquidity  to reflect the  underlying  characteristics  of
related estimated claim liabilities.

In 1999,  Trenwick  allocated  a portion  of its bond  portfolio  to high  yield
investments.  While these investments are more susceptible to credit risk, their
total market value represents less than 2% of total investments,  and therefore,
management  believes that the exposure to credit risk is not material.  Trenwick
has no derivatives  and its  investments do not contain terms that may result in
potential losses due to leverage.

Limited  information  is  available  with  respect  to the  investments  held by
Chartwell Managing Agents' syndicates,  and therefore, risk information provided
does not include such data.  Some or all of the risks  described in this section
may apply to the investments held by Chartwell Managing Agents' syndicates.

The investment  portfolio and borrowings of Trenwick are summarized in the Notes
to the Financial Statements.



                                       16

<PAGE>

Foreign Currency Exchange Rate Risk
Foreign  currency risk is the risk that Trenwick will incur economic  losses due
to adverse changes in foreign  currency  exchange  rates.  This risk arises from
Trenwick's international operations, debt obligations and securities denominated
in  foreign  currencies  and  foreign  equity  investments.  Trenwick  generally
conducts its international  businesses  through foreign operating entities which
generally  maintain  assets and liabilities in local  currencies,  substantially
limiting  exchange rate risk to net assets  denominated in the foreign  currency
which is the British pound sterling.  At December 31, 1999 and 1998,  Trenwick's
net  investment  in foreign  subsidiaries  was  approximately  $24.1 million and
$133.9 million, respectively. Debt obligations denominated in foreign currencies
were $19.4 million and foreign equity  investments were $2.9 million at December
31, 1999.  Trenwick  did not hold any debt  obligations  denominated  in foreign
currencies or foreign equity investments at December 31, 1998.

Trenwick's reinsurance,  international insurance and Lloyd's operations all have
exposures to movements in various currencies around the world, (particularly the
British pound sterling, the Euro and the Canadian dollar) as such businesses are
denominated in those currencies.  Therefore,  changes in currency exchange rates
affect Trenwick's  Balance Sheet,  Statement of Operations and Statement of Cash
Flows.  This exposure is somewhat  mitigated by the fact that premiums  received
are invested in the same currency portfolios, to partially offset related unpaid
claims and claims expense liabilities denominated in the same currency.

Management  estimates  that a 10%  immediate  unfavorable  change in each of the
foreign currency  exchange rates to which Trenwick is exposed as of December 31,
1999 would decrease the fair value of Trenwick's foreign  denominated net assets
by approximately $9.1 million, which is comprised of $7.4 million to the British
pound  sterling,  $1.5  million to the  Canadian  dollar and an aggregate of $.2
million to all other  foreign  currencies.  At December 31,  1998,  the same 10%
shift in currency  exchange rates  primarily the British pound  sterling)  would
result in a  potential  loss in fair value of $18.2  million.  Trenwick  has not
experienced a 10% shift in currency exposure in either 1998 or 1999.

Interest Rate Risk
Trenwick's  fixed maturity  investments and indebtedness are subject to interest
rate risk.  Increases  and  decreases in  prevailing  interest  rates  generally
translate  into  decreases  and  increases  in the fair value of fixed  maturity
investments  and the interest  payable on Trenwick's  outstanding  variable rate
debt. Additionally, the fair value of interest rate sensitive instruments may be
affected by the  creditworthiness  of the issuer, a prepayment option,  relative
values of alternative investments, liquidity of the investment and other general
market conditions.

The table below summarizes the estimated  effects of hypothetical  increases and
decreases in interest  rates.  It is assumed that the changes occur  immediately
and uniformly to each category of instrument containing interest rate risks. The
hypothetical  changes in market interest rates reflect what could be deemed best
or worst case scenarios.  Significant  variations in market interest rates could
produce changes in the timing of repayments due to prepayment options available.
The fair  value of such  instruments  could be  affected  and  therefore  actual
results might differ from those reflected in the following table:
<TABLE>
<CAPTION>
                                                                                          Estimated            Estimated
                                                                 Hypothetical                  Fair          Gain (Loss)
                                                                    Change in           Value After                 After
                                                                Interest Rate          Hypothetical          Hypothetical
                                         Fair Value at              (bp=basis             Change in             Change in
(dollars in thousands)                   Dec 31, 1999                 points)         Interest Rate         Interest Rate
<S>                                         <C>               <C>                         <C>                   <C>
Assets(1)
U.S. treasury                               1,404,248         100 bp decrease             1,467,926               63,678
                                                              100 bp increase             1,343,017              (61,231)
                                                              200 bp increase             1,284,971             (119,276)
                                                              300 bp increase             1,226,926             (177,322)


Liabilities(2)
Borrowings                                    344,775         100 bp decrease               356,579               11,805
                                                              100 bp increase               334,419              (10,355)
                                                              200 bp increase               325,231              (19,544)
                                                              300 bp increase               316,994              (27,781)

Aggregate                                   1,059,473         100 bp decrease             1,111,347               51,874
                                                              100 bp increase             1,008,598              (50,876)
                                                              200 bp increase               959,741              (99,733)
                                                              300 bp increase               909,932             (149,541)
</TABLE>


                                       17
<PAGE>

(1) Excludes investments held by Chartwell Managing Agents  managed  syndicates,
as  information  is  not  available, but  includes  preferred  shares, which are
grouped with equities on the face of the Balance Sheet but more closely resemble
debt instruments for risk analysis purposes.
(2) Liabilities include Trust Preferred for this analysis.
<TABLE>
<CAPTION>

                                                                                          Estimated             Estimated
                                                                Hypothetical                   Fair           Gain (Loss)
                                                                   Change in            Value After                 After
                                                               Interest Rate           Hypothetical          Hypothetical
                                         Fair Value at             (bp=basis              Change in             Change in
(dollars in thousands)                   Dec 31, 1998                points)          Interest Rate         Interest Rate
<S>                                           <C>            <C>                            <C>                  <C>
Assets(1)
U.S. treasury                                 773,144        100 bp decrease                802,195                29,051
                                                             100 bp increase                743,831              (29,313)
                                                             200 bp increase                714,351              (58,793)
                                                             300 bp increase                687,113              (86,031)



Liabilities
Borrowings                                    188,900        100 bp decrease                206,394                17,494
                                                             100 bp increase                174,233              (14,667)
                                                             200 bp increase                161,766              (27,134)
                                                             300 bp increase                151,033              (37,867)

Aggregate                                     584,244        100 bp decrease                595,801                11,557
                                                             100 bp increase                569,598              (14,646)
                                                             200 bp increase                552,585              (31,659)
                                                             300 bp increase                536,080              (48,164)
</TABLE>

(1) Does not include Trenwick International assets.

Trenwick has not experienced  unrealized gains or losses to the extent indicated
on the table above.





                                       18

<PAGE>

Equity Price Risk
The carrying  values of  investments  subject to equity price risks are based on
quoted market prices or  management's  estimates of fair value as of the balance
sheet date.  Market prices are subject to  fluctuation  and,  consequently,  the
amount realized in the subsequent sale of an investment may significantly differ
from the reported  market value.  Fluctuation  in the market price of a security
may result from perceived changes in the underlying economic  characteristics of
the investee,  the relative price of alternative  investments and general market
conditions.  Furthermore,  amounts realized in the sale of a particular security
may be affected by the relative quantity of the security being sold.

Of  Trenwick's  $110.6  million  equity  portfolio at December  31, 1999,  $56.6
million of common equity  investments  is subject to equity risk. The total also
includes $54.0 million of preferred  shares,  which are included in the interest
rate  risk  analysis,  as  their  characteristics  more  closely  resemble  debt
instruments.   Additionally,   $19.5  million  of  other  investments  generally
represent  partnership  interests that more closely resemble equity investments.
Trenwick's  potential  exposure  on  equity  securities  of  $56.6  million  and
partnership interests of $19.5 million is estimated in terms of an immediate 10%
drop  in  equity  prices  across  all  equity  securities  holdings  from  those
prevailing  at  December  31, 1999 which would  result in a $7.6  million  loss.
Trenwick's  actual loss in fair value on a quarterly  basis never  exceeded this
amount  during 1999.  Trenwick's  common  equity  portfolio of $49.2  million at
December  31,  1998,  was subject to changes in value based on changes in equity
prices. Trenwick's potential exposure from those equity securities, estimated in
terms of fair value, to an immediate 10% drop in equity prices across all equity
securities  holdings from those  prevailing at December 31, 1998 would have been
$4.9 million.  Trenwick's  actual loss in fair value on a quarterly  basis never
exceeded this amount during 1998.

The fair  value  estimates  shown are  based on the  composition  of the  equity
security  portfolio at year-end and these  exposures  will change as a result of
ongoing portfolio activities in response to management's  assessment of changing
market conditions and available investment opportunities.

The above  analyses  do not take into  account  any  correlation  among  foreign
currency  exchange rates, or any  correlation  among various markets (i.e.,  the
fixed income markets and foreign exchange and equity markets). Trenwick's actual
experience  may  differ  from the  results  noted  above due to the  correlation
assumptions  utilized,  or if  events  occur  that  were  not  included  in  the
methodology,  such as significant  liquidity or market events.  The selection of
the amount of increases or decreases in currency exchange rates,  interest rates
and equity values in the above analyses  should not be construed as a prediction
of future market events,  but rather, to illustrate the potential impact of such
an event.

Goodwill and Other Acquired Intangible Assets
Goodwill  was $153.8  million at December 31, 1999,  or  approximately  33.3% of
consolidated shareholders' equity. Goodwill represents the unamortized excess of
purchase  price over the fair value of net assets of  acquired  entities.  Other
intangibles represent Trenwick's acquisition of its prospective participation of
$9.5 million on syndicate  839 which  entitles one of its U.K.  subsidiaries  to
increase  its  syndicate  premium  limit for the 2000 year of  account to $344.0
million.  The amortization of goodwill and other acquired  intangible assets was
$1.4  million in 1999,  or  approximately  6.7% of the  pre-tax  loss.  Trenwick
amortizes goodwill and other acquired  intangibles on a straight-line basis over
twenty-five  years and five years,  respectively.  The risk  associated with the
carrying  value of  goodwill  and other  acquired  intangible  assets is whether
future  operating  income  (before  amortization  of goodwill and other acquired
intangible  assets) will be sufficient on an  undiscounted  basis to recover the
carrying value.  Trenwick regularly evaluates the recoverability of goodwill and
other  acquired  intangible  assets and  believes  such  amounts  are  currently
recoverable.  However, any significant change in the useful lives of goodwill or
other  acquired  intangible  assets,  as estimated by  management,  could have a
material  adverse  effect on  Trenwick's  results of  operations  and  financial
condition.

                                       19
<PAGE>


Accounting Standards
Accounting for Derivative Instruments and Hedging Activities - SFAS No. 133
In June 1998, the Financial  Accounting  Standards Board (FASB) issued Statement
of Financial  Accounting  Standards  (SFAS) No. 133,  "Accounting for Derivative
Instruments  and Hedging  Activities,"  which becomes  effective for Trenwick on
January 1, 2001. SFAS No. 133 establishes accounting and reporting standards for
derivative  instruments,  including certain derivative  instruments  embedded in
other  contracts,  and for  hedging  activities.  Trenwick  will be  required to
recognize all  derivatives  as either assets or  liabilities in the statement of
financial  position and measure those  instruments at fair value. The accounting
for  a  change  in  the  fair  value  of  a  derivative  in  earnings  or  other
comprehensive  income will depend on the intended use of the  derivative and the
resulting  designation.  Derivatives  can be  designated  as (a) a hedge  of the
exposure to changes in the fair value of a  recognized  asset or  liability or a
firm  commitment,  (b) a hedge  of the  exposure  to  variable  cash  flows of a
forecasted transaction, or (c) a hedge of the foreign currency exposure of a net
investment  in  foreign   operations,   an  unrecognized  firm  commitment,   an
available-for-sale  security,  or  a  foreign  currency  denominated  forecasted
transaction.

The difference  between a  derivative's  previous  carrying  amount and its fair
value at the date of  implementation  of SFAS No.  133  shall be  reported  as a
transition adjustment.  Such adjustment shall be reported in net income or other
comprehensive  income  as the  effect of a change in  accounting  principle  and
presented in a manner similar to the cumulative effect of a change in accounting
principle  in  accordance  with  Accounting  Principles  Board  Opinion  No. 20,
"Accounting  Changes."  Trenwick  is  currently  reviewing  the  impact  of  the
implementation of SFAS No. 133 on its financial statements.

The Euro
On January 1, 1999, eleven of the fifteen member countries of the European Union
established  a fixed  conversion  ratio  between  their local  currencies  and a
newly-formed  currency,  the "Euro." The Euro began trading on foreign  currency
exchanges  on January  1,  1999.  Beginning  in  January  2002,  coins and paper
currency  denominated in Euros will be issued and local currencies of the eleven
countries  will  be  withdrawn  from   circulation.   As  Trenwick   conducts  a
considerable amount of business in countries participating in the Euro, work was
undertaken  in 1998 to ensure  that the  introduction  of the Euro would have no
adverse  effect on  Trenwick's  business.  Consequently,  Trenwick  modified its
computer systems to accommodate  transactions denominated in the Euro. The total
cost for implementing these changes was not material. Trenwick believes the Euro
conversion  will  not  have a  material  impact  on its  consolidated  financial
position or results from operations.

Safe Harbor Disclosure
In  connection  with the "safe  harbor"  provisions  of the  Private  Securities
Litigation Reform Act of 1995,  Trenwick sets forth below cautionary  statements
identifying  important  risks and  uncertainties  that  could  cause its  actual
results to differ  materially from those that might be projected,  forecasted or
estimated in its "forward-looking  statements" within the meaning of Section 27A
of the Securities Act of 1933 and Section 21E of the Securities  Exchange Act of
1934,  made by or on behalf  of  Trenwick  in this  annual  report and in  press


                                       20
<PAGE>

releases, written statements or documents filed with the Securities and Exchange
Commission, or in its communications and discussions with investors and analysts
in the normal course of business  through  meetings,  phone calls and conference
calls.  Such  statements  may include,  but are not limited to,  projections  of
premium revenue,  investment income, other revenue, losses,  expenses,  earnings
(including earnings per share), cash flows, plans for future operations,  common
shareholders'  equity (including book value per share),  investments,  financing
needs,  capital  plans,  dividends,  plans  relating  to products or services of
Trenwick and estimates  concerning the effects of litigation or other  disputes,
as well as  assumptions  for any of the foregoing and generally  expressed  with
words  such  as  "believes,"  "estimates,"  "expects,"  "anticipates,"  "plans,"
"projects,"   "forecasts,"  "goals,"  "could  have,"  "may  have,"  and  similar
expressions.  Trenwick,  as a matter  of  policy,  does  not  make any  specific
projections as to future earnings nor does it endorse any projections  regarding
future performance that may be made by others.

Forward-looking  statements  involve known and unknown risks and  uncertainties,
which  may  cause   Trenwick's   results   to   differ   materially   from  such
forward-looking  statements.  These risks and uncertainties include, but are not
limited to, the following:

-  Changes  in the  level  of  competition  in the  domestic  and  international
reinsurance or primary insurance markets that affect the volume or profitability
of Trenwick's  property/casualty  business.  These changes include,  but are not
limited to,  changes in the  intensity  of price  competition,  the entry of new
competitors,  existing competitors exiting the market and the development of new
products by new and existing competitors;

- Changes in the demand for reinsurance,  including changes in ceding companies'
risk retentions and changes in the demand for excess and surplus lines insurance
coverages;

- The ability  of  Trenwick to  execute its strategies in its  property/casualty
operations;

- Catastrophe  losses in Trenwick's domestic and international property/casualty
businesses;

- Adverse development on property/casualty claims and claims expense liabilities
related to  business  written in prior  years,  including,  but not  limited to,
evolving  case law and its  effect  on  environmental  and other  latent  injury
claims, changing government regulations, newly identified toxins, newly reported
claims, new theories of liability,  such as possible Year 2000  computer-related
losses, or new insurance and reinsurance contract interpretations;

- Changes in  inflation  that affect the  profitability  of  Trenwick's  current
property/casualty  business or the adequacy of its property/casualty  claims and
claims  expense  liabilities  and policy  benefit  liabilities  related to prior
years' business;

- Changes in Trenwick's property/casualty retrocessional arrangements;

- Lower  than  estimated  retrocessional  or  reinsurance  recoveries  on unpaid
losses,  including,  but  not  limited  to,  losses  due  to a  decline  in  the
creditworthiness of Trenwick's retrocessionaires or reinsurers;




                                       21
<PAGE>

- Increases in interest  rates,  which may cause a reduction in the market value
of Trenwick's fixed income portfolio, and its common shareholders' equity;

- Decreases in interest  rates which may cause a reduction  of income  earned on
new cash flow from operations and the reinvestment of the proceeds from sales or
maturities of existing investments;

- Decline in the value of Trenwick's equity investments;

- Changes in the composition of Trenwick's investment portfolio;

- Credit losses on Trenwick's investment portfolio;

-  Adverse  results  in  litigation  matters,  including,  but not  limited  to,
litigation  related to  environmental,  asbestos and other  potential  mass tort
claims;

- The impact of mergers and acquisitions;

- Gains or losses related to changes in foreign currency exchange rates; and

- Changes in Trenwick's capital needs.

In  addition  to the  factors  outlined  above  that  are  directly  related  to
Trenwick's  businesses,  Trenwick  is also  subject to general  business  risks,
including, but not limited to, adverse state, federal or foreign legislation and
regulation,  adverse  publicity or news  coverage,  changes in general  economic
factors and the loss of key employees.

The  facts  set  forth  above  should  be  considered  in  connection  with  any
forward-looking statement contained in this Annual Report. The important factors
that could affect such  forward-looking  statements  are subject to change,  and
Trenwick  does  not  intend  to  update  any  forward-looking  statement  or the
foregoing list of important factors. By this cautionary note Trenwick intends to
avail itself of the safe harbor from liability  with respect to  forward-looking
statements provided by Section 27A and Section 21E referred to above.







                                       22
<PAGE>




                              TRENWICK GROUP INC.
                           CONSOLIDATED BALANCE SHEET
<TABLE>
<CAPTION>
                                                                                    December 31,
                                                                                 1999            1998
                                                                                (dollars in thousands)
<S>                                                                           <C>             <C>
Assets
Securities available for sale at fair value: Debt securities
  (amortized cost:  $1,325,438 and $867,552)                                  $1,311,361      $  893,020
Equity securities (cost:  $107,946 and $44,342)                                  110,666          49,188
Other investments                                                                 19,446               -
Investments held by managed syndicates                                           137,745               -
Total investments                                                              1,579,218         942,208
Cash and cash equivalents                                                        125,954          63,003
Cash and cash equivalents held by managed syndicates                              44,687               -
Accrued investment income                                                         26,122          15,974
Premiums in process of collection                                                270,455         138,550
Reinsurance recoverable balances, net                                            644,578         140,173
Prepaid reinsurance premiums                                                     100,000          22,632
Goodwill                                                                         153,824           1,605
Deferred policy acquisition costs                                                 78,896          35,261
Net deferred income taxes                                                         97,442          14,101
Current income taxes receivable                                                   27,292           2,544
Deposits                                                                          20,227               -
Other assets                                                                      71,904          16,210
Total asset                                                                   $3,240,599      $1,392,261

Liabilities and common stockholders' equity
Liabilities
Unpaid claims and claims expenses                                             $1,964,139      $  682,428
Unearned premium income                                                          379,684         152,051
Senior credit facilities                                                          94,501               -
6.70% senior notes due 2003                                                       75,000          75,000
10.25% senior notes due 2004                                                      39,831               -
Contingent interest notes                                                         34,699               -
Other long term debt                                                               4,874               -
Other liabilities                                                                 75,541          24,753
Total liabilities                                                              2,668,269         934,232

Company-obligated   mandatorily   redeemable  preferred
  capital  securities  of subsidiary trust holding solely
  junior subordinated  debentures of Trenwick Group Inc.                         110,000         110,000

Minority interest                                                                     81               -

Common stockholders' equity
Common stock, $.10 par value,
  30,000,000 shares authorized,
  16,888,981 and 11,051,394 shares
  outstanding                                                                      1,689           1,105
Additional paid-in-capital                                                       291,361         124,180
Deferred compensation under stock award plan                                      (3,553)         (2,905)
Retained earnings                                                                182,477         206,312
Accumulated other comprehensive income                                            (9,725)         19,337
Total common stockholders' equity                                                462,249         348,029
Total liabilities and common stockholders' equity                             $3,240,599      $1,392,261
</TABLE>

        The accompanying notes are an integral part of these statements.




                                       23

<PAGE>

                              TRENWICK GROUP INC.
                   CONSOLIDATED STATEMENTS OF OPERATIONS AND
                              COMPREHENSIVE INCOME
<TABLE>
<CAPTION>
                                                                        Year ended December 31,
                                                                 1999             1998            1997
                                                                 (in thousands except per share data)
<S>                                                            <C>              <C>             <C>
Revenues
Net premiums earned                                            $325,114         $245,561        $190,156
Net investment income                                            66,394           56,316          48,402
Equity in net earnings of investees                                 188                -               -
Net realized investment gains                                     1,916            9,016           2,304
Other income                                                        673              421              10
Total revenues                                                  394,285          311,314         240,872
Expenses
Claims and claims expenses incurred                             254,538          153,135         109,554
Policy acquisition costs                                         96,095           74,197          58,549
Underwriting expenses                                            37,389           23,795          15,425
General and administrative expenses                               7,182            3,461               -
Interest expense                                                  9,176            3,954             894
Amortization expense                                              1,423               33               -
Minority interest in subsidiary trust                             9,702            9,702           8,920
Total expenses                                                  415,505          268,277         193,342
Income (loss) before income taxes and
   extraordinary item                                           (21,220)          43,037          47,530
Income tax (benefit) expense                                    (10,172)           8,245          11,241
Income (loss) before extraordinary item                         (11,048)          34,792          36,289
Extraordinary loss on debt redemption,
  net of $558 income tax benefit                                      -                -          (1,037)
Net income (loss)                                              $(11,048)        $ 34,792        $ 35,252
Basic earnings per share
Income (loss) before extraordinary item                           $(.94)           $2.99           $3.12
Net income (loss)                                                 $(.94)           $2.99           $3.03
Diluted earnings per share
Income (loss) before extraordinary item                           $(.94)           $2.95           $3.01
Net income (loss)                                                 $(.94)           $2.95           $3.01
Comprehensive income
Net income (loss)                                              $(11,048)        $ 34,792        $ 35,252
Other comprehensive income (loss)
Unrealized investment gains (losses)                            (39,779)           8,183          15,316
Realized investment gains included in
  net income                                                     (1,916)          (9,016)         (2,304)
Foreign currency translation adjustment                          (3,302)            (553)              -
Income tax benefit (expense) applicable
  to other comprehensive income                                  15,935              478          (4,556)
Total other comprehensive income (loss)                         (29,062)            (908)          8,456
Comprehensive income (loss)                                    $(40,110)        $ 33,884        $ 43,708

</TABLE>

        The accompanying notes are an integral part of these statements.



                                       24

<PAGE>


                              TRENWICK GROUP INC.
                       CONSOLIDATED STATEMENT OF CHANGES
                            IN STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>
                                                                      Year ended December 31,
                                                                 1999             1998            1997
                                                            (dollars in thousands except per share data)
<S>                                                            <C>              <C>             <C>
Common stockholders' equity,
  beginning of year                                            $348,029         $357,649        $265,753

Common stock, $.10 par value, and additional
  paid-in-capital
Common shares issued in exchange for
  Chartwell shares (7,964,998 shares)                           209,400                -               -
Fair value of stock options issued
  in exchange for Chartwell options                               3,632                -               -

Exercise of employer stock options
  (122,195 and 76,750 shares)                                         -            1,536             956
Restricted common stock awarded
  (65,985, 82,889, and 9,782 shares)                              1,914            2,952             327
Restricted common stock awards cancelled
  (8,827 and 2,133 shares)                                         (284)               -             (42)
Income tax benefit (expense) from
  Additional compensation deductions
  Allowable for income tax purposes                                 (28)           1,321             626
Conversion of debentures (1,783,926 shares)                           -                -          57,780
Common stock purchased and retired
  (2,184,569, 1,104,750 and 5,091 shares)                       (46,869)         (35,433)           (171)

Deferred compensation under stock award plans
Restricted common stock awarded                                  (1,914)          (2,952)           (327)
Restricted common stock awards cancelled                            284                -              42
Compensation expense recognized                                     982              770             543

Retained earnings
Net income (loss)                                               (11,048)          34,792          35,252
Cash dividends
($1.04, $1.00 and $.97 per share)                               (12,787)         (11,698)        (11,546)

Accumulated other comprehensive income
Other comprehensive income (loss)                               (29,062)            (908)          8,456

Common stockholders' equity,
  end of year                                                  $462,249         $348,029        $357,649

</TABLE>

        The accompanying notes are an integral part of these statements.



                                       25

<PAGE>



                              TRENWICK GROUP INC.
                      CONSOLIDATED STATEMENT OF CASH FLOWS
<TABLE>
<CAPTION>

                                                                      Year ended December 31,
                                                                 1999             1998            1997
                                                                            (in thousands)
<S>                                                           <C>              <C>             <C>
Cash flows for operating activities
Premiums collected                                            $386,087         $242,620        $149,351
Ceded premiums paid                                           (138,622)         (53,643)        (10,026)
Claims and claims expenses paid                               (369,033)        (184,386)       (117,916)
Claims and claims expenses recovered                            56,897           25,815           2,841
Underwriting expenses paid                                     (30,579)         (27,378)        (13,753)
Cash provided by (used for)
  underwriting activities                                      (95,250)           3,028          10,497
Net investment income received                                  71,858           59,443          50,469
Service and other income received,
  net of expenses                                                   18               91               -
General and administrative expenses paid                        (7,182)          (3,461)              -
Interest expense and subsidiary trust
  dividends paid                                               (19,946)         (12,276)         (5,364)
Income taxes paid                                               (1,796)          (8,956)         (8,592)
Cash provided by (used for)
  operating activities                                         (52,298)          37,869          47,010
Cash flows for investing activities
Purchases of debt securities                                  (647,670)        (537,787)       (203,554)
Sales of debt securities                                       372,225          116,895          33,980
Maturities of debt securities                                  397,165          445,800          78,770
Purchases of equity securities                                 (29,656)         (11,538)        (12,967)
Sales of equity securities                                      21,560           15,088           5,009
Acquisition of subsidiary,
  net of cash acquired                                          74,229          (39,799)              -
Additions to premises and equipment                             (1,783)          (4,596)           (227)
Other, net                                                         (55)               -               -
Cash provided by (used for)
  investing activities                                         186,015          (15,937)        (98,989)

Cash flows for financing activities
Issuance of other long-term debt                                94,473                -               -
Issuance of senior notes                                             -           75,000               -
Issuance of mandatorily redeemable
  Preferred  capital securities                                      -                -         110,000
Repayment of other long-term debt                              (48,417)               -               -
Issuance costs of senior notes and
  capital securities                                                 -             (922)         (1,669)
Issuance costs of long-term debt                                (4,055)               -               -
Redemption of convertible debentures                                 -                -         (46,997)
Issuance of common stock                                             -           1,536              956
Repurchase of common stock                                     (44,604)         (34,880)           (171)
Dividends paid                                                 (12,787)         (11,698)        (11,546)
Other, net                                                      (9,056)               -               -
Cash provided by (used for)
  financing activities                                         (24,446)          29,036          50,573
Effect of exchange rate on cash                                 (1,633)            (812)              -
Change in cash and cash equivalents                            107,638           50,156          (1,406)
Cash and cash equivalents,
  beginning of year                                             63,003           12,847          14,253
Cash and cash equivalents, end of year                        $170,641         $ 63,003         $12,847

</TABLE>

        The accompanying notes are an integral part of these statements.



                                       26
<PAGE>


TRENWICK GROUP INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1
Organization
and Summary of
Significant
Accounting
Policies

Organization
Trenwick  Group  Inc.  (Trenwick  or the  Company)  is a holding  company  whose
principal   subsidiaries   underwrite   specialty   insurance  and  reinsurance.
Trenwick's principal operating subsidiaries include Trenwick America Reinsurance
Corporation  (Trenwick America Re),  Chartwell  Reinsurance  Company  (Chartwell
Reinsurance),  The Insurance Corporation of New York (INSCORP), Dakota Specialty
Insurance   Company   (Dakota),   Trenwick   International   Limited   (Trenwick
International) and Chartwell Managing Agents Limited (CMA), a managing agency in
the Lloyd's marketplace.

Trenwick America Re, located in Stamford,  Connecticut,  reinsures  property and
casualty risks primarily written by U.S. insurance  companies.  Trenwick America
Re  underwrites  treaty  reinsurance.   Trenwick  America  Re  is  domiciled  in
Connecticut and is licensed,  authorized or approved to write reinsurance in all
50 states and the District of Columbia.

Chartwell  Reinsurance,  located in  Stamford,  Connecticut,  underwrote  treaty
reinsurance  for  casualty,  property,  marine and  aviation  risks prior to its
acquisition  by the Company.  Chartwell  Reinsurance  is currently  domiciled in
Minnesota  and is licensed,  authorized or approved to write  reinsurance  in 49
states and the District of Columbia.  Chartwell Reinsurance is in the process of
re-domesticating  to  Connecticut  and changing its name to Chartwell  Insurance
Company.  It will be used by the Company to underwrite  primary insurance in the
future.

INSCORP,  located in Jericho,  New York,  is a primary  insurance  company  that
develops property and casualty insurance  programs through specialty  production
sources focusing on a specific line of business and geographic  region.  INSCORP
is  domiciled in New York and is  licensed,  authorized  or approved to transact
business in all 50 states, the District of Columbia and Canada.

Trenwick International,  headquartered in London, England, underwrites specialty
insurance and reinsurance of risks primarily  located outside the U.S.  Trenwick
International's  business  principally  consists of  insurance  and  facultative
reinsurance  of  specialty  classes.  Trenwick  International  also  underwrites
property and casualty treaty  reinsurance.  A branch office in Paris specializes
in  facultative  reinsurance  of  large,  technically  complex  property  risks.
Trenwick  International  is  domiciled  in England  and is  authorized  to write
insurance  in over 30  countries  and  participates  in the  London  market  for
worldwide reinsurance.

Trenwick,  through corporate  subsidiaries,  participates in the underwriting of
Lloyd's  syndicates  managed  by  Chartwell  Managing  Agents  Limited  (CMA) by
providing  funds  at  Lloyd's,  primarily  in the  form  of  letters  of  credit
supporting   underwriting   capacity.   The  syndicates  in  which  the  Company
participates underwrite aviation, marine and non-marine risks.


                                       27
<PAGE>

CMA is the eighteenth largest managing agency at Lloyd's, managing three Lloyd's
syndicates  for the 2000 year of account.  CMA is domiciled in England and, as a
Lloyd's  managing general agent, is subject to regulation and supervision by the
Council of Lloyd's.

Basis of Presentation
The consolidated  financial  statements  include the accounts of the Company and
all subsidiaries.  Significant  intercompany accounts and transactions have been
eliminated in consolidation. Certain items in the financial statements have been
reclassified to conform with the 1999 presentation.

The  accompanying  consolidated  financial  statements  have  been  prepared  in
conformity  with generally  accepted  accounting  principles  (GAAP) in the U.S.
which require  management  to make  estimates  and  assumptions  that affect the
reported  amounts of assets and liabilities and disclosure of contingent  assets
and liabilities at the date of the financial statements and the reported amounts
of revenues and expenses  during the  reporting  period.  Actual  results  could
differ  from  those  estimates.  The  following  is  a  summary  of  significant
accounting policies.

Investments and Cash Equivalents
Trenwick has classified all of its debt and equity  securities as "available for
sale" and  reported  them at fair  value  with net  unrealized  gains and losses
included in other  comprehensive  income,  net of related deferred income taxes.
The fair value of debt  securities  and equity  securities  is  estimated  using
quoted  market  prices or  broker  dealer  quotes.  Cash  equivalents  represent
investments  with maturities at date of purchase of three months or less and are
carried at cost which approximates fair value.

Investments  in  companies  in which the  Company  has the  ability to  exercise
significant influence over the operating and financial policies of the investees
are accounted for under the equity method. In addition,  limited partnerships in
which the Company  holds  greater than 3% interest are  accounted  for under the
equity method.

Realized gains or losses on  disposition  of  investments  are determined on the
basis of the specific  identification  method.  Investment  income consisting of
dividends and interest, net of investment expenses, is recognized in income when
earned.  The  amortization  of  premiums  and  accretion  of  discount  for debt
securities  is computed  utilizing  the interest  method.  The  effective  yield
utilized in the interest method is adjusted when sufficient  information  exists
to estimate the  probability  and timing of prepayments on  mortgage-backed  and
asset-backed  securities.  The net investment in the security is adjusted to the
amount that would have existed had the new  effective  yield been applied  since
the  acquisition  of  the  security  and  that  adjustment  is  included  in net
investment income.

The Company has included in the consolidated balance sheet its pro-rata share of
the investments and cash and cash equivalents held by CMA's managed  syndicates.
Such pro-rata share is determined based on the Company's  percentage of capacity
owned through its dedicated corporate capital vehicles.

Revenues
Insurance and  reinsurance  premiums are earned (net of reinsurance  ceded) on a
pro-rata  basis  over the  related  contract  period.  Unearned  premium  income
represents  the  portion of  premiums  applicable  to the  unexpired  portion of
premium  coverage  with renewal  dates later than  year-end.  Such  reserves are
computed by pro-rata  methods for direct business and are  established  based on
reports received from ceding  companies for  reinsurance.  Premiums on contracts
are accrued on an estimated basis  throughout the term of such contracts.  These
estimates  may  change  in  the  near  term.  Retrospectively  rated  and  other
experience  rated  reinsurance  contracts are estimated and accrued for based on
the  difference  between total costs before and after the  experience  under the
contract (the  with-and-without  method).  These estimates of experience to date
are based on statistical data with subsequent adjustments recorded in the period
in which they become known.


                                       28

<PAGE>

Deposits
Reinsurance  contracts  that do not  meet  insurance  accounting  risk  transfer
requirements are classified as deposits. These deposits are treated as financing
transactions  and are  credited  or  charged  with  interest  income or  expense
according to contract  terms.  Cash flows from these  deposit  transactions  are
included in "cash flows for financing activities" in the consolidated  statement
of cash flows.

Policy Acquisition Costs
Policy  acquisition  costs are stated net of policy  acquisition costs ceded and
primarily  consist of commissions and brokerage  expenses  incurred at policy or
contract issue date.  These costs vary with,  and are primarily  related to, the
acquisition  of business and are deferred and amortized over the period in which
the related premiums are earned.  Deferred policy acquisition costs are reviewed
periodically  to determine  that they do not exceed  recoverable  amounts  after
allowing for anticipated investment income.

Reserve for Unpaid Claims and Claims Expenses
Claims are recorded as incurred so as to match such costs with premiums over the
contract  periods.  The amount provided for unpaid claims consists of any unpaid
reported  claims and  estimates  for incurred but not  reported  claims,  net of
salvage and subrogation. The estimates for claims incurred but not reported were
developed based on the Company's  historical  claims experience and an actuarial
evaluation of expected  claims  experience.  Insurance  liabilities are based on
estimates  and  the  ultimate  liability  may  vary  from  such  estimates.  Any
adjustments to these estimates are reflected in income when known.

Income Taxes
Income taxes are provided based on income reported in the financial  statements.
Deferred  income taxes are  provided  based on an asset and  liability  approach
which requires the recognition of deferred income tax assets and liabilities for
the  expected  future tax  consequences  of  temporary  differences  between the
financial   statement   carrying  amounts  and  the  tax  bases  of  assets  and
liabilities.

Provision   for  U. S.  income  taxes  on  undistributed  earnings  of  foreign
subsidiaries is made only on those amounts in excess of the funds  considered to
be permanently  reinvested.  Repatriation of undistributed  earnings of non-U.S.
subsidiaries is done only when it is tax efficient to do so.





                                       29

<PAGE>


Goodwill and Other Acquired Intangible Assets
Goodwill represents the unamortized excess of purchase price over the fair value
of net assets of acquired entities.  Other acquired  intangible assets represent
Trenwick's  acquisition  of  its  prospective  participation  of  $9,485,000  on
syndicate  839,  which  entitled  one of its U.K.  subsidiaries  to increase its
syndicate  premium  limit  for the 2000 year of  account  to  $344,000,000.  The
Company   amortizes   goodwill  and  other  acquired   intangible  assets  on  a
straight-line  basis  over 25 years  and 5 years,  respectively.  On a  periodic
basis, the Company estimates the future  undiscounted cash flows of the business
to which it relates in order to ensure that the  carrying  value of goodwill and
other acquired intangible assets has not been impaired.  Amortization charged to
operations for each of the years ended December 31, 1999 and 1998 was $1,423,000
and $33,000, respectively.  Accumulated amortization of goodwill at December 31,
1999 and 1998 was $1,456,000 and $33,000, respectively.


Stock-Based Compensation
Trenwick  grants stock  options for a fixed number of common shares to employees
and  non-employee  directors with an exercise price equal to the market value of
the  shares at the date of  grant.  The  accounting  standard,  "Accounting  for
Stock-Based  Compensation,"  supersedes the previous  opinion and  establishes a
fair  value-based  method of  accounting  for  stock-based  compensation  plans.
However, it permits an entity to continue to apply the accounting  provisions of
Accounting Principles Board Opinion, "Accounting for Stock Issued to Employees,"
and make pro forma  disclosures of net income and earnings per share,  as if the
fair market value-based  method had been applied.  Trenwick continues to account
for the stock option  grants in  accordance  with the  previous  opinion and has
included the pro forma  disclosures  required by the fair value-based  method in
Note 10.

Earnings Per Share
Trenwick adopted the accounting standard,  "Earnings Per Share," which specifies
the computation,  presentation and disclosure requirements of earnings per share
and supersedes the previous  standard.  It requires a dual presentation of basic
and diluted  earnings per share.  Basic  earnings per share,  which excludes the
effect of common stock equivalents, replaces primary earnings per share. Diluted
earnings per share, which utilizes the average market price per share as opposed
to the greater of the average  market price per share or ending market price per
share when  applying the  treasury  stock  method in   determining  common stock
equivalents, replaces fully-diluted earnings per share.

Minority Interest
Minority interest represents the minority  stockholders'  proportionate share of
the equity of certain subsidiaries of Chartwell UK.

Premises and Equipment
Premises and equipment,  including leasehold  improvements are included in other
assets in the accompanying  Consolidated  Balance Sheet and are recorded at cost
and are  amortized  or  depreciated  using the  straight-line  method over their
useful lives.  Accumulated  amortization  and  depreciation  was  $6,863,000 and
$5,703,000 as of December 31, 1999 and 1998, respectively.

Issuance Costs of Capital Securities and Other Debt
The issuance  costs of the capital  securities,  senior notes and senior  credit
facilities are being amortized over the term of the related financial instrument
using the interest method. Accumulated amortization was $421,000 and $129,000 as
of December 31, 1999 and 1998, respectively.


                                       30
<PAGE>

Insurance Brokerage Assets and Liabilities
The  following  fiduciary  assets and  liabilities  maintained  by the Company's
insurance agency subsidiaries on behalf of the insureds are presented net in the
consolidated financial statements at December 31, 1999 (in thousands):

Cash                                         $  3,000
Accounts receivable                            31,603
Accounts payable                              (34,603)

Comprehensive Income
Trenwick  adopted the accounting  standard,  "Reporting  Comprehensive  Income,"
which  establishes  standards for reporting and  presentation  of  comprehensive
income and its components.  Comprehensive  income comprises net income and other
comprehensive  income.  Other comprehensive income consists of the change in the
net unrealized  appreciation of investments  and the change in foreign  currency
translation adjustments, both net of income taxes.

Foreign Exchange
The assets and liabilities of foreign  operations whose  functional  currency is
other than the U.S.  dollar are  translated at the rate of exchange in effect at
the  balance  sheet  date.  Revenues  and  expenses  of foreign  operations  are
translated  at the average  exchange  rates  during the year.  The effect of the
translation  adjustments  for foreign  operations,  net of  applicable  deferred
income taxes, is recorded as a cumulative  translation adjustment in accumulated
other comprehensive income within stockholders' equity.  Investments denominated
in foreign  currencies  are  translated  into the U.S.  dollar using the rate of
exchange  at  the  balance  sheet  date  and  unrealized  gains  and  losses  on
translation,  net of applicable  deferred  income  taxes,  are recorded to other
comprehensive income. Foreign currency transaction gains and losses are included
in other income.

Accounting for Derivative Instruments and Hedging Activities
Effective  January  1,  2001,  Trenwick  expects  to  adopt  the new  accounting
standard,  "Accounting for Derivative Instruments and Hedging Activities," which
requires all  derivatives  to be  recognized on the balance sheet at fair value.
The  Company is  currently  reviewing  the impact of the  implementation  of the
standard on its financial statements.

Note 2
Acquisitions

Chartwell Re Corporation
On October 27, 1999,  Trenwick  completed the merger of Chartwell Re Corporation
(Chartwell) with and into Trenwick. Under the terms of the merger,  stockholders
of  Chartwell  received  0.825  Trenwick  shares for each  Chartwell  share in a
tax-free  transaction.  Described below are the adjustments to record the assets
and liabilities at fair value and allocate the purchase price over fair value of
net assets acquired. All amounts are in thousands, except per share amounts.

Chartwell's outstanding common shares                                   9,655
Exchange ratio for the conversion of shares                             0.825
Trenwick common shares issued in exchange for
  Chartwell common shares                                               7,965
Trenwick's average price per common share                            $  26.29
Total consideration for Chartwell's
  common shares                                                      $209,400
Total consideration for Chartwell's
  common stock options                                                  3,632
Acquisition costs                                                      18,294
Total purchase price                                                 $231,326
Less
Fair value of Chartwell's net assets                                   78,011
Goodwill                                                             $153,315




                                       31

<PAGE>

The  acquisition  has been accounted for using the purchase method of accounting
and, accordingly,  the purchase price has been allocated to the assets purchased
and the  liabilities  assumed based on the estimated  fair values at the date of
acquisition.  As a condition to the merger,  Chartwell purchased, at the time of
the  closing  of the  transaction,  a  reinsurance  policy  providing  for up to
$100,000,000 in order to indemnify Trenwick against  unanticipated  increases in
Chartwell's  reserves for business  written on or before the date the merger was
completed.  See Note 5 -  Reinsurance.  In connection  with the  acquisition  of
Chartwell,  the Company  recognized a liability of approximately  $4,700,000 for
anticipated severance costs of former Chartwell employees. The total amount paid
under the severance plan as of December 31, 1999 was  approximately  $4,300,000.
The excess of the purchase price over the estimated fair value of the net assets
of  approximately  $153,315,000  has been  recorded as goodwill,  which is being
amortized on a  straight-line  basis over 25 years.  The purchase price has been
allocated  based  on a  preliminary  estimate  of the fair  value of net  assets
acquired.  All assets and  liabilities  of  Chartwell  are  consolidated  in the
balance sheet as of December 31, 1999 and its operating results are consolidated
in Trenwick's  results  commencing with the period from October 28, 1999 through
December 31, 1999.

The following  unaudited pro forma  consolidated  results of operations  for the
years ended December 31 assume the acquisition had occurred on January 1 of each
year:

                                                    1999            1998
                                          (in thousands, except per share data)
Net premiums earned                            $  478,226        $ 475,065
Total revenue                                     573,660          609,118
Net income (loss)                                (124,331)          59,697
Basic net income (loss) per share              $    (6.76)       $    3.04
Diluted net income (loss) per share            $    (6.76)       $    2.99

The  above  unaudited  pro  forma  financial   information  is  not  necessarily
indicative either of the results of operations that would have occurred had this
transaction  been  consummated  at the beginning of the periods  presented or of
future results of operations.

LaSalle Re Holdings Limited
On December 19,  1999,  Trenwick  and LaSalle Re Holdings  Limited  (LaSalle Re)
signed a  definitive  agreement  for  Trenwick  and LaSalle Re to combine,  with
shareholders of both companies receiving shares in a new Bermuda holding company
to be named  Trenwick  Group Ltd.  Under the terms of the  business  combination
agreement,  shareholders  of Trenwick and LaSalle Re will each receive shares in
the newly  formed  Trenwick on a  one-for-one  basis.  The  acquisition  will be
accounted for as a purchase.  Trenwick  expects to close the  transaction in the
second  quarter of 2000,  subject to shareholder  and  regulatory  approvals and
other customary conditions.



                                       32

<PAGE>

On March 20,  2000,  Trenwick  and LaSalle Re amended and  restated the business
combination agreement in order to revise the portion of the business combination
agreement  related to the  restructuring  of Trenwick  immediately  prior to the
combination with LaSalle Re.

Note 3
Investments

The following  tables  reconcile  amortized  cost to the estimated fair value of
debt and equity securities:

(in thousands) December 31, 1999
<TABLE>
<CAPTION>
                                                                                Gross            Gross
                                                           Amortized       Unrealized          Unrealized         Fair
                                                                Cost            Gains            Losses           Value
<S>                                                        <C>                 <C>             <C>             <C>
U.S. Treasury securities and
  obligations of U.S. government
  corporations and agencies                                $  114,839          $   379         $   (681)       $  114,537
Obligations of states and
  political subdivisions                                      460,176            2,221           (7,404)          454,993
Mortgage-backed and
  asset-backed securities                                     290,801            1,263           (3,529)          288,535
Debt securities issued by
  British government                                          117,165              110           (2,252)          115,023
Debt securities issued by other
  foreign governments                                          55,436               44             (484)           54,996
Public utilities                                               21,229               43             (381)           20,891
Corporate securities                                          262,855              443           (3,852)          259,446
Certificates of deposit                                         2,937                3                -             2,940
Total debt securities                                      $1,325,438          $ 4,506         $(18,583)       $1,311,361
Equity securities                                          $  107,946          $ 7,752         $ (5,032)       $  110,666

</TABLE>

(in thousands) December 31, 1998
<TABLE>
<CAPTION>
                                                                                 Gross             Gross
                                                            Amortized       Unrealized        Unrealized             Fair
                                                                 Cost            Gains            Losses            Value
<S>                                                          <C>               <C>              <C>              <C>
U.S. Treasury securities and
  obligations of U.S. government
  corporations and agencies                                  $ 64,831          $ 3,851          $   (14)         $ 68,668
Obligations of states and
  political subdivisions                                      380,593           13,544             (120)          394,017
Mortgage-backed and
  asset-backed securities                                     206,790            8,648           (3,322)          212,116
Debt securities issued by
  British government                                           45,949              587                 -           46,536
Debt securities issued by other
  foreign governments                                           8,163               78                 -            8,241
Public utilities                                                2,864              222                 -            3,086
Corporate securities                                           55,364            2,011              (65)           57,310
Redeemable preferred stock                                      2,000               48                 -            2,048
Certificates of deposit                                       100,998                -                 -          100,998
Total debt securities                                        $867,552          $28,989          $(3,521)         $893,020
Equity securities                                            $ 44,342          $ 6,514          $(1,668)         $ 49,188

</TABLE>




                                       33
<PAGE>

The fair  value and  amortized  cost at  December  31,  1999 are shown  below by
contractual maturity periods for all debt securities except  mortgage-backed and
asset-backed  securities.  Expected  maturities  will  differ  from  contractual
maturities  because  borrowers may have the right to call or prepay  obligations
with or without  penalty.  The maturities for  mortgage-backed  and asset-backed
securities are included in the table based on expected maturity dates.

                                                         Fair        Amortized
(in thousands)                                          Value             Cost
                                                    ----------       ----------
Due in one year or less                             $   94,546       $   93,913
Due after one year through
  five years                                           544,077          545,161
Due after five years through
  ten years                                            482,652          490,465
Due after ten years                                    190,086          195,899
Total debt securities                               $1,311,361       $1,325,438

Net Investment Income and Net Realized Investment Gains
During the twelve months ended  December 31, 1999, all  investments  were income
producing.  The sources of net investment income for the years ended December 31
are as follows:

(in thousands)                           1999             1998            1997
                                       -------          -------         -------
Debt securities                        $61,964          $53,752         $47,400
Equity securities                        2,442            1,744           1,257
Investments held by
  managed syndicates                     1,843                -               -
Cash and cash
  equivalents                            1,666            2,470           1,228
Cash and cash
  equivalents
  held by managed
  syndicates                               644                -               -
Other investments                          177                -               -
Gross investment income                 68,736           57,966          49,885
Investment expenses                     (2,342)          (1,650)         (1,483)
Net investment income                  $66,394          $56,316         $48,402

Net realized gains (losses) on sales of investments are as follows:

(in thousands)                           1999             1998            1997
Debt securities
Gross realized gains                  $ 3,147           $2,250          $  151
Gross realized losses                  (6,797)            (201)           (146)
Equity securities
Gross realized gains                    6,009            7,012           2,299
Gross realized losses                    (443)             (45)               -
Net realized
  investment gains                    $ 1,916           $9,016          $2,304

Trenwick  generally  limits its  investments in debt  securities  that are rated
below investment  grade, as these  investments are subject to a higher degree of
credit risk than investment  grade  securities.  Trenwick  closely  monitors its
below  investment  grade  securities  as  well  as the  creditworthiness  of the
portfolio as a whole. When fair values decline for reasons other than changes in
interest rates or other perceived temporary conditions,  the security is written
down to its net realizable  value. In the twelve months ended December 31, 1999,
Trenwick wrote down the value of certain securities by $5,179,000.



                                       34
<PAGE>


Unrealized Appreciation of Investments Available for Sale
The components of the net unrealized appreciation  (depreciation) of investments
available for sale at December 31 are as follows:

(in thousands)                                         1999             1998
                                                    ---------         ---------
Net unrealized appreciation
  (depreciation) of debt
  securities                                        $(14,077)         $ 25,468
Net unrealized appreciation
  of equity securities                                 2,720             4,846
Net unrealized appreciation
  (depreciation) of
  investments                                        (11,357)           30,314
Deferred tax benefit (expense)                         3,907           (10,622)
Net unrealized appreciation
  (depreciation) of
  investments available
  for sale, net of income taxes                     $ (7,450)         $ 19,692

Investments and Cash Held as Collateral or on Deposit
Debt securities and cash with a carrying value of $127,026,000 are being held in
trust as  collateral  for certain  reinsurance  obligations.  In addition,  debt
securities  and cash with a carrying  value of  $41,104,000 at December 31, 1999
were on deposit with various  state or  governmental  insurance  departments  in
order to comply with insurance  laws.  Cash in the amount of $4,954,000 has also
been pledged as collateral for letters of credit for reinsurance obligations.

At December 31, 1999,  the Company had cash of  $5,040,000  held in a collateral
account in conjunction with a loan guarantee.

At December 31, 1999, the Company had loaned  securities  with carrying value of
approximately  $16,155,000  at  fair  market  value  under  a  security  lending
agreement administered through U.S. Bank. In connection with these transactions,
the Company  holds as collateral  cash or securities  with a fair value equal to
102% of the  fair  value  of the  securities  lent to  others.  Such  collateral
securities  are marked to market on a daily basis and  borrowers are required to
supply  additional  collateral to prevent any collateral from falling below 102%
of the fair value of the loaned securities.







                                       35


<PAGE>

Note 4
Unpaid Claims and Claims Expenses

The  following  table  presents an  analysis of gross and net unpaid  claims and
claims expenses and a  reconciliation  of beginning and ending net unpaid claims
and claims expense balances. The gross unpaid claims and claims expense balances
at December 31, 1999 and 1998 are reflected in Trenwick's  consolidated  balance
sheet.  The net unpaid  claims and claims  expense  balances are stated on a net
basis after  deductions for reinsurance  recoverable on unpaid claims and claims
expenses from retrocessionaires.

<TABLE>
<CAPTION>

(in thousands)                                                                1999                1998            1997
                                                                              ----                ----            ----
<S>                                                                       <C>                   <C>            <C>
Gross unpaid claims and claims expenses,
              beginning of year                                             $682,428            $518,387       $ 467,177
Reinsurance recoverable on unpaid claims and claims
              expenses, beginning of year                                    233,164             139,036          80,290
Unpaid claims and claims expenses, net of
              reinsurance recoverable, beginning of year                     449,264             379,351         386,887
                                                                          ----------            ---------       --------

Unpaid claims and claims expenses, net of
              reinsurance recoverable, of companies acquired                 808,466              81,299               -
                                                                          ----------            ---------       ---------

Provision for claims and claims expenses, net of reinsurance recoverable:
For claims incurred in the current year                                      239,910             165,691         114,920
For claims incurred prior to the current year                                 14,628             (12,556)         (5,366)
                                                                          ----------            ---------       ----------
              Subtotal                                                       254,538             153,135         109,554
                                                                          ----------            ---------       ----------

Payments for claims and claims expenses, net of reinsurance:
For claims incurred in the current year                                     (65,856)             (42,883)        (22,893)
For claims incurred prior to the current year                              (230,493)            (122,145)        (94,197)
                                                                          ----------            ---------       ----------
              Subtotal                                                     (296,349)            (165,028)       (117,090)
                                                                          ----------            ---------       ----------

Effect of exchange rate changes on unpaid claims
              and claims expenses                                            (8,483)                 507               -
                                                                          ----------            ---------       ----------

Unpaid claims and claims expenses, net of
              reinsurance recoverable, end of year                         1,207,436             449,264         379,351
                                                                          ----------            ---------       ----------

Reinsurance recoverable on unpaid claims and
              claims expenses, end of year                                   756,703             233,164        139,036
                                                                          ----------            ---------       ----------
Gross unpaid claims and claims expenses,
              end of year                                                 $1,964,139            $682,428       $518,387
                                                                          ==========            =========      ===========
</TABLE>

In 1999, Trenwick recorded a gross increase of $83,175,000 and a net increase of
$14,628,000 in estimates for claims occurring in prior accident years, including
cessions of $46,460,000 to the Chartwell adverse  development cover discussed in
Note 5. In 1998 and 1997,  Trenwick  recorded net decreases of  $12,556,000  and
$5,366,000,  respectively,  in estimates for claims  occurring in prior accident
years.  The  increase in 1999 is due to  unfavorable  development  of prior year
reserves in Trenwick  America Re. In 1999,  Trenwick  America Re's  estimates of
prior  accident year claims  increased by  approximately  $25,402,000 on a gross
basis and  $16,189,000  on a net  basis.  In 1998 and 1997,  estimates  of prior
accident year claims were reduced by  approximately  $7,175,000 and  $5,366,000,
respectively. Trenwick America Re's increase in 1999 reflects a deterioration in
market  conditions  since 1997.  In 1999  estimates of Trenwick  International's
prior year claims  increased by  $11,313,000  on a gross basis and  decreased by
$1,561,000 on a net basis. In 1998, Trenwick  International's  prior year claims
were reduced by  approximately  $5,381,000 on a net basis. The gross increase in
1999 was offset by the effect of reinsurance  and favorable  development  across
certain lines of business.


                                       36
<PAGE>

Inflation raises the cost of economic losses and non-economic damages covered by
insurance contracts and, therefore,  is a factor in determining  effective rates
of  reinsurance.  The  methods  used by Trenwick  to  estimate  individual  case
reserves  and  reserves  for claims  incurred  but not yet  reported  implicitly
incorporate the effects of inflation in the projection of ultimate losses.

Due  to  the  inherent  uncertainties  of  estimating  insurance  company  claim
reserves,  actual claims and claims expenses may deviate, perhaps substantially,
from  estimates of  Trenwick's  reserves  reflected in  Trenwick's  consolidated
financial  statements.  Trenwick's  management  believes  that its claim reserve
methods are  reasonable and prudent and that  Trenwick's  reserve for claims and
claims  expenses  at December  31, 1999 are  adequate.  However,  reserves  also
include  provisions  for  latent  injury or toxic  tort  claims  that  cannot be
estimated with  traditional  reserving  techniques.  Due to  inconsistent  court
decisions'  in federal  and state  jurisdictions  and the wide  variation  among
insureds with respect to underlying facts and coverage,  uncertainty exists with
respect to these claims as to liabilities of ceding companies and, consequently,
reinsurance  coverage.  With the exception of INSCORP, the Company's exposure to
such latent  losses is not  expected  to be  significant  due to its  relatively
recent entry into the reinsurance business, its low historical levels of premium
volume prior to the  application  of exclusions  for asbestos and  environmental
liabilities and its retrocessional programs. To the extent that there is adverse
development  in  INSCORP's  loss  reserves,  including  its  reserves for latent
losses,  the Company's  obligation under the Contingent  Interest Notes due June
30,  2006 (the CI Notes)  will be  reduced.  To the  extent  the CI Notes do not
provide  sufficient  protection  against  adverse  development in INSCORP's loss
reserves,  Trenwick  may  be  entitled  to  recoveries  under  the  $100,000,000
reinsurance  policy purchased by Chartwell  immediately prior to its acquisition
by Trenwick. See Note 5-Reinsurance.

Trenwick's  reserves  include an estimate of Trenwick's  ultimate  liability for
asbestos and  environmental  claims.  The gross and net unpaid claims and claims
expenses for asbestos and environmental claims are as follows:

(in thousands)                                    1999         1998        1997
                                                  ----         ----        ----
Unpaid claims and claims expenses gross of
   reinsurance recoverable, end of year         $100,131       $8,476     $8,924
Unpaid claims and claims expenses, net of
   reinsurance recoverable, end of year           72,092        8,428      8,814
Reinsurance recoverable on unpaid claims and
   claims expenses, end of year                   28,039           48        110

The increase of the gross and net unpaid claims and claims expenses reflects the
inclusion of the reserves related to the Chartwell acquisition.






                                       37
<PAGE>

Note 5
Reinsurance

Trenwick enters into reinsurance and retrocessional agreements to reduce its net
liability on individual risks,  protect against catastrophic losses and maintain
acceptable ratios.

Trenwick America Re has various retrocessional facilities, all of which are on a
treaty basis.  These  retrocessional  facilities include one treaty for Trenwick
America Re's facultative casualty reinsurance business,  which applies on a risk
or account basis,  and two for its treaty  property  business,  which protect it
against multiple claims arising out of a single occurrence or event. As a result
of these facilities,  Trenwick America Re's maximum retention generally does not
exceed  $500,000 per  occurrence  on  facultative  business and  $2,300,000  per
occurrence on property catastrophe business. From 1989 to 1999, Trenwick America
Re  has  purchased  aggregated  excess  of  loss  ratio  treaties  from  several
reinsurers.  These  facilities  provided  Trenwick  with a layer  of  protection
against  adverse  results  from its  domestic  casualty  business  in  excess of
specified  loss ratios.  Trenwick  did not purchase an aggregate  excess of loss
ratio treaty for 2000.

Trenwick  International,  as customary  with  companies  operating in the London
market,  buys  large  amounts of  reinsurance.  Reinsurance  and  retrocessional
coverage is  customized  for each class of business.  During 1998,  following an
increase in its share capital, Trenwick International increased its retention of
business by reducing the amount of reinsurance it buys, principally proportional
reinsurance treaties with its former parent.

Chartwell  Managing Agency, as part of its business  strategy,  has historically
purchased a  significant  amount of  reinsurance  for the Lloyd's  syndicates it
manages.  Reinsurance is generally  purchased to protect the syndicates  against
extraordinary  loss or loss  involving  one or more  underwriting  classes.  The
amount  purchased is  determined  with  reference to the  syndicates'  aggregate
exposure and potential loss scenarios.

INSCORP and Dakota, the primary insurance  subsidiaries of Canterbury  Financial
Group, each purchases reinsurance specifically tailored to each of the specialty
programs which they underwrite.

Effective October 27, 1999, Chartwell  purchased,  at the time of the closing of
the transaction,  a reinsurance policy providing for up to $100,000,000 in order
to indemnify Trenwick against  unanticipated  increases in Chartwell's  reserves
for business written on or before the date the merger was completed. The Company
has  applied  the  provisions  of the  Financial  Accounting  Standards  Board's
Emerging Issues Task Force Topic D-54 to account for future adverse  development
covered by the agreement.  Recoverables  under the agreement are presented gross
in the  consolidated  balance sheet as "Reinsurance  recoverable  balances." The
related benefit for losses ceded to the agreement is reflected as a reduction to
"Claims  and claims  expenses  incurred"  as  discussed  in Note 4. The  benefit
related  to  other  underwriting   balances  is  reflected  as  a  reduction  to
"Underwriting  expenses." In addition, as part of the merger, Chartwell commuted
several  aggregate  stop-loss  contracts.  Reinsurance  agreements  provide  for
recovery of a portion of certain claims and claims expenses from reinsurers.




                                       38
<PAGE>

Trenwick  remains  liable in the event that the  reinsurer is unable to meet its
obligation; however, Trenwick holds partial collateral under these agreements.

The effects of reinsurance on premiums written and premiums earned for the three
years ended December 31, are as follows:

(in thousands)                       1999                1998            1997
                                     ----                ----            ----

Direct premiums written           $ 128,224            $  60,510      $       -
Assumed premiums written            377,317              262,854        248,662
Ceded premiums written             (150,931)             (73,145)       (53,432)
                                   ---------           ----------      ---------
Net premiums written              $ 354,610            $ 250,219       $195,230
                                   ========            =========       =========

Direct premiums earned            $  84,542            $  54,605      $       -
Assumed premiums earned             376,927              269,093        233,090
Ceded premiums earned              (136,355)             (78,137)       (42,934)
                                   ---------           ----------      ---------
Net premiums earned               $ 325,114            $ 245,561      $ 190,156
                                   ========             ========       =========

The Company recorded ceded claims and claims expenses  incurred of $204,399,000,
$81,955,000  and  $60,789,000  for the years ended  December 31, 1999,  1998 and
1997, respectively.

The components of reinsurance  recoverable balances, net on the balance sheet at
December 31 are as follows:

(in thousands)                                     1999                  1998
                                               ----------              ---------
Paid claims                                    $   66,698             $  17,098
Unpaid claims and claims expenses                 756,703               233,164
Funds held liability                             (126,222)              (86,614)
Reinsurance balances payable                      (52,601)              (23,475)
                                                ----------            ----------
Reinsurance recoverable balances, net          $  644,578             $ 140,173
                                                ==========            ==========

The funds held liability includes  approximately  $27,277,000 and $16,641,000 of
imputed interest as of December 31, 1999 and 1998,  respectively.  Approximately
$10,636,000,  $7,009,000 and $4,989,000 of interest  expense was incurred during
1999,  1998 and 1997,  respectively,  and  recorded as a reduction to net earned
premiums.

Letters of credit,  trust accounts and funds withheld in the aggregate amount of
$269,344,000  (including  interest)  have  been  arranged  in favor of  Trenwick
collateralizing    reinsurance    recoverables    with    respect   to   certain
retrocessionaires.  At  December  31,  1999,  approximately  36%  of  Trenwick's
reinsurance  recoverables  on unpaid claims and claims  expenses are recoverable
from  five  principal  retrocessionaires.  These  retrocessionaires  are  Zurich
Reinsurance N.A, Continental Casualty Company,  Centre Re-Insurance Ltd., London
Life and Casualty  Reinsurance  Corporation  and UNUM Life Insurance  Company of
America which had reinsurance recoverable balances of $148,854,000, $39,209,000,
$37,163,000,  $24,391,000  and  $22,363,000,  respectively at December 31, 1999.
Such companies are rated A or better by A.M. Best Company.

Included in Deposits on the balance  sheet at December 31, 1999 are  $13,310,000
deposited  with  European  International   Reinsurance  Limited  and  $6,917,000
deposited with Centre Reinsurance  (Bermuda) Limited,  both of which are secured
by letters of credit.


                                       39
<PAGE>


For  the  years  ended  December  31,  1999,  1998  and  1997,  Trenwick  earned
commissions on cessions to  retrocessionaires  of  $25,422,000,  $10,495,000 and
$4,503,000, respectively.


Note 6
Income Taxes

Income  taxes are  established  on a  consolidated  basis for all  domestic  and
international operations of Trenwick. In 1997, the income tax provision includes
an income tax benefit of $558,000  applicable to an  extraordinary  loss on debt
redemption. The components of the provision for income taxes for the years ended
December 31 are as follows:

(in thousands)                          1999             1998              1997
                                     --------          -------          --------
Current expense
  (benefit)
Federal                             $(14,578)           $4,392          $ 7,197
Foreign                                1,515             2,324                -
State                                    (44)              200              262
Total current
  expense (benefit)                 $(13,107)           $6,916          $ 7,459
Deferred expense
  (benefit)
Federal                             $  6,765            $1,110          $ 3,224
Foreign                               (3,830)              219                -
Total deferred expense                 2,935             1,329            3,224
Total income tax expense
  (benefit)                         $(10,172)           $8,245          $10,683

Due to the carryback of current  year's losses to previous  years taxable income
including the Chartwell  companies,  the Company will recoup the maximum  amount
refundable for taxes paid in the preceding two tax years.

The  income  tax  provision  for each of the years  presented  differs  from the
amounts  determined by applying the applicable U.S. statutory federal income tax
rate of 35% to income (loss) before income taxes as a result of the following:

(in thousands)                        1999              1998              1997
                                    --------          --------          --------
Income (loss) before
  income taxes                     $(21,220)          $43,037           $45,935
Income taxes at
  statutory rate                    ($7,427)          $15,063           $16,077
Effect of tax-exempt
  investment income                  (6,227)           (5,654)           (5,757)
Foreign operations                      903              (256)                -
Amortization of
  goodwill                              498                 -                -
Valuation allowance                     770                 -                -
Other, net                            1,311              (908)              363
Income tax provision
  (benefit)                        $(10,172)           $8,245           $10,683

As of December 31, 1999, the Company and all includible  subsidiaries  have U.S.
net operating loss carryforwards of $53,195,000 which will be available (subject
to the annual  limitation  discussed  below) to offset  regular  taxable  income
during the carryforward  period (expiring 2019). Of the total net operating loss
carryforward,  $15,717,000  was generated by INSCORP prior to its acquisition in
1995 and is limited by Section 382 of the Internal  Revenue  Code,  to an annual
amount of $3,483,000 to offset future taxable income each year.


                                       40
<PAGE>

The Company  provides  income  taxes on the  undistributed  earnings of non-U.S.
subsidiaries except to the extent that such earnings are considered  permanently
reinvested  outside the U.S. It is not  practicable  to determine  the amount of
income or  withholding  tax that would be payable upon the  remittance  of those
earnings.   However,  the  Company  does  not  anticipate  that  the  income  or
withholding  tax that  would be payable  upon  remittance  of the  undistributed
earnings of the non-U.S. subsidiaries would aggregate to a material amount.

Deferred  income tax assets  (liabilities)  are  attributable  to the  following
temporary differences as of December 31:

(in thousands)                                            1999            1998
                                                       --------        --------
Deferred income tax asset
Discounting and other loss
  reserve adjustments                                  $ 30,647        $ 27,152
Unearned premium income                                   8,657           6,862
Net operating losses                                     18,618               -
Lloyd's loss reserve accrual                             22,980               -
Contingent interest note                                 11,514               -
Tax basis difference
  on portfolio securities                                 3,938               -
Employee stock option and
  compensation plans                                      1,135             651
Foreign tax credit                                        7,722               -
Alternative minimum taxes                                 3,684           1,390
Currency translation
  adjustments                                             1,603             197
Excess tax basis of
  foreign subsidiaries                                   18,305             632
Foreign operations                                        6,207               -
Unrealized depreciation of
  investments available
  for sale                                                3,907               -
Other                                                     2,206               -
Gross deferred income
  tax assets                                            141,123          36,884
Less:  Valuation allowance                              (23,982)              -
Deferred tax assets after
  valuation allowance                                   117,141          36,884

Deferred income tax liability
Policy acquisition costs
  deferred                                              (13,289)        (10,716)
Unrealized appreciation of
  investments available for sale                               -        (10,622)
Earned but not reported
  premiums net of loss
  and expense                                            (2,358)              -
Accretion of market
  discount on debt securities                            (1,416)         (1,282)
Equity investment adjustments                            (1,102)              -
Other                                                    (1,534)           (163)
Gross deferred income
  tax liabilities                                       (19,699)        (22,783)
Net deferred income tax assets                         $ 97,442        $ 14,101



                                       41
<PAGE>

During 1999, the Company recorded a valuation allowance of $23,982,000 to reduce
its deferred  tax asset in  accordance  with the  provisions  of the  accounting
standard  "Accounting  For Income Taxes" (FASB 109). The valuation  allowance is
necessary because  sufficient  uncertainty exists regarding the realizability of
certain  foreign tax credits and other deferred tax assets related to the excess
tax basis of foreign  subsidiaries.  The Company  will  periodically  review the
adequacy of the  valuation  allowance  and will  recognize  benefits only as the
reassessment  indicates  that it is "more  likely than not" that these  benefits
will be realized.  In accordance  with the provisions of FASB 109, any reduction
in the valuation  allowance will be offset against goodwill.  Realization of the
related tax benefits will depend upon the  recognition  of future  earnings from
foreign  operations or a change in  circumstances  that cause the recognition of
these benefits to meet the "more likely than not" standard of FASB 109.


Note 7
Long-Term Debt

Senior Notes
On March 27, 1998 Trenwick completed a private offering of $75,000,000 aggregate
principal amount of its 6.70% Senior Notes due April 1, 2003 (the Senior Notes).
Interest is payable  semi-annually  on April 1 and October 1 of each year, which
commenced  on October 1, 1998.  The Senior  Notes are not subject to  redemption
prior to maturity.  They are unsecured obligations and will rank senior in right
of payment to all existing  and future  subordinated  indebtedness  of Trenwick,
including  Trenwick's  obligations with respect to its 8.82% Junior Subordinated
Debentures  held by Trenwick  Capital Trust I in respect of the  $110,000,000 in
8.82%  Subordinated  Capital Income  Securities  issued by the Trust.  Under the
terms  of  the  Senior  Notes,   Trenwick  is  not  restricted   from  incurring
indebtedness,  but  is  subject  to  limits  on its  ability  to  incur  secured
indebtedness for borrowed money.

On March 17, 1994,  Chartwell completed a public offering of 10.25% Senior Notes
due 2004, having a total principal amount of $75,000,000.  On December 13, 1995,
the obligations were assumed by Chartwell Re Holdings Corporation  (Chartwell Re
Holdings).  Of the original balance,  Chartwell Re Holdings redeemed $26,250,000
on April 8, 1996 and repurchased $8,675,000 on November 24, 1999.

Mandatorily Redeemable Preferred Capital Securities
On January 28, 1997,  Trenwick  completed a private  offering of $110,000,000 in
8.82% Subordinated Capital Income Securities through Trenwick Capital Trust I, a
Delaware statutory business trust. Trenwick owns all of the common securities of
the trust.  Concurrently with the issuance of the capital securities,  the trust
invested the proceeds of their sale, together with the consideration paid to the
trust by Trenwick for the common securities,  in Trenwick's junior  subordinated
debentures, whose terms are similar to those of the capital securities.




                                       42

<PAGE>

The trust was formed for the sole purpose of issuing the capital  securities and
the common securities, investing the proceeds thereof in the junior subordinated
debentures and making  distributions  to the holders of the capital  securities.
The  capital  securities  mature  on  February  1,  2037;  require  preferential
cumulative cash distributions at an annual rate of 8.82%, payable  semi-annually
on  February 1 and  August 1  (beginning  August 1,  1997)  from the  payment of
interest on the junior subordinated debentures;  and are guaranteed by Trenwick,
within certain  limits,  as to the payment of  distributions  and liquidation or
redemption payments. They are subject to mandatory redemption;  (i) in whole but
not in part at maturity,  upon repayment of the junior subordinated  debentures,
at a redemption  price equal to the greater of the principal amount plus accrued
and   unpaid   interest;   (ii)  in  whole   but  not  in  part  at  any   time,
contemporaneously  with  the  optional  prepayment  of the  junior  subordinated
debentures  upon  the  occurrence  and  continuation  of  certain  events,  at a
redemption  price  equal to the greater of the  principal  amount or the present
value of principal  and interest  payable to February 1, 2007,  plus accrued and
unpaid  interest and possible  additional  sums;  and (iii) in whole or in part,
after February 1, 2007,  contemporaneously  with the optional  prepayment of the
junior  subordinated  debentures,  at a redemption  price equal to the principal
amount plus accrued and unpaid interest and possible  additional  sums. Upon the
occurrence  and  continuation  of an event of default with respect to the junior
subordinated debentures, the capital securities shall have a preference over the
common  securities.  Upon the  occurrence of an event of default with respect to
the junior  subordinated  debentures which is attributable to Trenwick's failure
to make required payments or with respect to Trenwick's  guarantee,  the holders
of the capital  securities  may institute a direct action against  Trenwick.  In
accordance with their terms, the capital securities were subsequently  exchanged
for fully registered capital  securities,  which are not subject to restrictions
on transfer.

Convertible Debentures
On February 20, 1997, Trenwick called for redemption all $103,500,000  aggregate
principal amount of Trenwick's 6% convertible  debentures due December 15, 1999,
at a redemption  price of 102.57%  principal amount plus accrued interest to the
redemption date. Of the $103,500,000  principal amount of debentures outstanding
on that  date,  $45,819,000  principal  amount  were  redeemed  and  $57,681,000
principal  amount  were  converted  into an  aggregate  of  1,783,926  shares of
Trenwick's common stock.

As a result  of the  redemption,  Trenwick  recorded  an  extraordinary  loss of
$1,037,000 net of a tax benefit of $558,000 in 1997.

Senior Credit Facilities
On November 24, 1999, Trenwick entered into a $400,000,000 credit agreement with
various lending institutions, The Chase Manhattan Bank, as Administrative Agent,
First Union  National Bank, as  Syndication  Agent,  and Fleet National Bank, as
Documentation  Agent. This new credit facility provides for a $170,000,000,  364
day revolving  credit facility with an option to pay out outstanding  borrowings
under such facility over the four years  following the expiration of the 364 day
period. In addition,  the credit facility provides for a $230,000,000 five year,
Lloyd's letter of credit facility, with a one year automatic renewal option. The
applicable  interest rate on borrowings  under the credit  facility is currently
1.3% above the London  Interbank  Offered Rate or The Chase Manhattan Bank prime
commercial  lending rate. A commitment fee is charged on the unutilized  portion
of the facility and is currently at .25%.  At the end of the  revolving  period,
all outstanding  revolving  loans will, at the option of Trenwick,  convert to a
four-year term loan facility,  subject to scheduled principal  amortization over
the  four-year  period.  As of December  31, 1999,  Trenwick  has  approximately
$94,501,000 of revolving loans  outstanding,  the proceeds of which were used to
retire  Chartwell  Re  Holdings'  syndicated  debt  facility  with First  Union,
repurchase  Trenwick  common  shares,  and redeem a portion of the  Chartwell Re
Holdings senior debt. The Letter of Credit Facility of $230,000,000 is available
in U.S.  Dollars or Pounds  Sterling and shall only be issued for the account of
Lloyd's to support Trenwick's syndicate participations. The unsecured letters of
credit  are in  force  for  five  years  and will  automatically  renew  for one
additional year on the anniversary of the November  closing date. The Applicable
Margin is charged on an annual  basis on the utilized  portion of the  facility,
which is currently  $208,000,000.  A commitment fee, which is currently .25%, is
charged on the unused portion of the Letter of Credit Facility.




                                       43

<PAGE>

The Chase Credit Facility contain general  covenants and restrictions as well as
financial covenants relating to, among other things,  minimum interest coverage,
debt to  capital  leverage,  minimum  earned  surplus  and  tangible  net worth.
Trenwick and the banks party to the credit facility executed an amendment to the
credit  facility,  dated as of December 31, 1999,  reducing the required minimum
consolidated  tangible net worth of Trenwick from  $325,000,000  to $290,000,000
until June 30, 2000.  After giving effect to the  amendment,  as of December 31,
1999, the Company is in compliance with the covenants.

Contingent Interest Notes

In conjunction with the 1999  acquisition of Chartwell,  the Company assumed all
of the obligations under the CI Notes,  which were originally issued by Piedmont
Management Company Inc. (Piedmont), INSCORP's former parent, to its stockholders
just prior to its  acquisition  by Chartwell  in 1995.  The CI Notes were issued
immediately  prior to Chartwell's  acquisition of Piedmont to protect  Chartwell
against the possibility of adverse  development of INSCORP's reserves for losses
and loss adjustment expenses and long-tail casualty exposures. The CI Notes were
issued in an aggregate  principal amount of $1,000,000,  with principal accruing
interest at a rate of 8% per annum,  compounded annually. Such interest will not
be payable until  maturity or earlier  redemption of the CI Notes.  In addition,
the CI Notes will  entitle  the  holders  thereof to  receive  at  maturity,  in
proportion to the principal amount of the CI Notes held by them, an aggregate of
from $10,000,000 up to $55,000,000 in contingent interest.  Settlement of the CI
Notes may be made by payment of cash or, at the Company's election,  by delivery
of shares of the Company's common stock. In order for the CI Notes to be settled
in common stock of the Company,  the  Company's  common stock must be registered
under the Securities Act of 1933 and listed on a national securities exchange or
the NASDAQ  National  Market.  For purposes of any settlement of the CI Notes in
the  Company's  common stock,  the value  ascribed to each share of common stock
shall be 85% of the average of the closing  sales prices of the common stock for
the 20 trading days  immediately  preceding  the fifth  trading day prior to the
settlement date. The CI Notes mature on June 30, 2006. At December 31, 1999, the
CI Notes are  recorded at the present  value of the amount  which is  reasonably
determined  to be payable at  maturity.  The  Company  believes  that  INSCORP's
reserves for loss and loss  adjustment  expenses are an appropriate  estimate of
projected ultimate losses and loss adjustment expenses to be paid and therefore,
at this time,  the  maximum  amount of  contingent  interest  on the CI Notes is
presently expected to be paid at maturity. The CI Notes contain covenants, which
relate  to the  maintenance  of  certain  records  and  limitations  on  certain
indebtedness.  As of December 31, 1999 the Company is in  compliance  with those
covenants.

Future minimum payments on long term debt as of December 31, 1999 are as follows
(in thousands):

                                           1999
                                          -------
2000                                      $94,501
2002                                        4,874
2003                                       75,000
2004                                       40,075
2006                                       34,699
                                           ------
                                         $249,149




                                       44

<PAGE>

Note 8
Commitments and
Contingencies

Letters of Credit
At  December  31,  1999,  Trenwick  has  outstanding  standby  letters of credit
totaling  $208,000,000  as part of the senior credit  facilities  supporting CMA
syndicate  participations.  Additionally,  INSCORP  has a  $3,100,000  letter of
credit to support the  participation  in Riverside  Underwriters,  plc.  Both of
these standby letters of credit are in force for five years, and provide capital
to participate in certain Lloyd's  syndicates for the 1996 to 2000  underwriting
years of account.

Lloyd's syndicate 839 has a letter of credit facility for $21,400,000,  which is
secured by its Sterling  Premium Trust Fund.  This letter of credit is deposited
in the United States Surplus Lines Trust Fund.

Letters  of credit  are also  provided  to support  domestic  and  international
reinsurance operations, totaling approximately $2,700,000.

Lines of Credit
Trenwick  International  has  established  a line of credit  under  which it can
borrow up to  $1,618,000  at a rate of 2.5% above the lending  bank's base rate.
Chartwell UK also has  established a line of credit under which it can borrow up
to $1,618,000 at a rate of 1% above the lending bank's base rate. These lines of
credit  are  available  in the event  that  funds  are  required  to  supplement
short-term working capital.  There were no material borrowings under either line
of credit during 1999.

Lloyd's  syndicates  270,  741  and  2741  have  separate  lines  of  credit  of
$7,000,000,  $1,780,000  and  $485,000  respectively.  There  were  no  material
borrowings under these lines of credit during 1999.

Limited Partnership Investment
Chartwell  Reinsurance  has committed to invest  $15,000,000 in a private equity
fund, High Ridge Capital  Limited  Partnership,  which makes  investments in the
insurance industry.  The Company contributed a total of $13,300,000 to this fund
as of December 31, 1999.

Operating Lease Agreements
Trenwick leases office space under non-cancelable  operating leases which expire
at various dates through 2015. Trenwick's future minimum lease commitments as of
December 31, 1999 are as follows:

2000                                                        $ 5,659,633
2001                                                          5,250,608
2002                                                          5,139,674
2003                                                          5,303,349
2004                                                          5,453,766
2005 and thereafter                                          19,870,082

Total office rent expense for the years ended  December 31, 1999,  1998 and 1997
is $3,024,000, $2,042,000 and $917,000, respectively.



                                       45

<PAGE>


Litigation
The  Company  is party to various  legal  proceedings  generally  arising in the
normal  course of its  business.  The Company does not believe that the eventual
outcome  of any such  proceeding  will have a material  effect on its  financial
condition or results of operations or cash flows. The Company's subsidiaries are
regularly  engaged in the investigation and the defense of claims arising out of
the  conduct  of  their  business.  Pursuant  to  the  Company's  insurance  and
reinsurance arrangements,  disputes are generally required to be finally settled
by arbitration.

Note 9
Stockholders'
Equity

Preferred Stock
Trenwick has 2,000,000  shares of $.10 par value preferred stock  authorized and
none outstanding.

Common Stock
During the year,  Trenwick's Board of Directors approved an additional 3,000,000
shares to its stock  repurchase  program for a total of  4,600,000  shares.  The
program was originally  adopted on May 21, 1997.  During 1999,  2,176,200 shares
were repurchased at an average price of $21.42 per share.

Between  January 1, 2000 and March 30,  2000,  Trenwick  has  purchased  829,300
shares under its buyback plan, at an average price of $16.56 per share. Trenwick
has an authorization of 494,000 shares remaining under the plan.

Stockholder Rights Plan
During 1997, Trenwick adopted a new stockholder rights plan,  replacing the plan
adopted  in  1989,   and  redeemed  the  rights  issued  under  the  1989  plan.
Stockholders  of record at the close of business on September  24, 1997 received
$0.01 for each redeemed  right  (equivalent  to $0.00667 per share) and received
one new right for each share of common  stock held.  The rights are  exercisable
only if a  person  or  group  acquires  beneficial  ownership  of 15% or more of
Trenwick's   common  stock  or  commences  a  tender  or  exchange   offer  upon
consummation of which such person or group would beneficially own 15% or more of
Trenwick's  common stock.  Each right  entitles a stockholder  to buy 1/200 of a
share of Trenwick's Series B Junior Participating Preferred Stock at an exercise
price of $125,  subject to adjustment.  Trenwick has reserved  200,000 shares of
such preferred stock for possible issuance under the plan.

In the event  that an  acquirer  accumulates  15% or more of  Trenwick's  common
stock,  all rights  holders  except the acquirer may purchase,  for the exercise
price, in lieu of the Series B Junior  Participating  Preferred Stock, shares of
common stock of Trenwick  having a market  value of twice the exercise  price of
each right.  If Trenwick is acquired in a merger or other  business  combination
after the  acquisition  of 15% of Trenwick's  common stock,  all rights  holders
except the acquirer may purchase the  acquirer's  shares at a similar  discount.
Trenwick is entitled to redeem the rights at $0.01 per right, subject to certain
restrictions. The rights will expire on September 23, 2007.



                                       46

<PAGE>

Note 10
Employee Benefits
and Compensation
Arrangements

Retirement Plans
Trenwick  has  a  defined  contribution  plan  and a  401(k)  savings  plan  for
substantially  all  U.S.  full-time  employees.  Trenwick  contributes  8% of an
eligible  employee's  total  compensation  to  the  pension  plan;  no  employee
contributions  are  made  to the  plan.  Trenwick  matches  100%  of  employees'
contributions  to the savings plan up to 6% of each  eligible  employee's  total
compensation. Assets of both plans are administered by life insurance companies.
Trenwick's  contributions  to the  pension  plan  were  $429,000,  $463,000  and
$503,000 for 1999, 1998 and 1997, respectively; its contributions to the savings
plan were $365,000, $351,000 and $330,000 for 1999, 1998 and 1997, respectively.

A member of management will receive a supplemental  employee  benefit payable at
the earlier of age 65 or employment termination. The supplement will be equal to
the  aggregate  contributions  made  with  respect  to the  employee  to a trust
established  by the company.  Annual  contribution  to the trust is 13.5% of the
employee's  base  salary as  stated  in the  employment  agreement.  The  amount
expensed in 1999 for this employee benefit obligation is not material.

Trenwick  also  maintains a money  purchase  defined  contribution  pension plan
covering substantially all Trenwick International employees. Contributions under
this plan are determined on the basis of salary and age. Trenwick's contribution
to this plan in 1999 and 1998 was $1,427,000 and $997,000, respectively.

Chartwell U.K. operates  contributory  defined  contribution  plans for its U.K.
employees.  The level of the  contribution  varies  between 5% and 20% dependent
upon the age of each  participant  at the beginning of each calendar  year.  The
amount  expensed  in 1999 for the  obligation  under  these  plans  amounted  to
$435,000.

The defined  contribution  plan for  Chartwell's  U.S.  employees was terminated
immediately  prior to the consummation of the merger of Chartwell into Trenwick.
As a result,  certain former Chartwell employees became members of the Company's
plan  and,  in  certain  instances,  the  assets  held  by  those  employees  in
Chartwell's plans were transferred to the Company's plans.

Stock Options and Common Stock Warrants
Trenwick  has  several  plans  through  which it makes  options in common  stock
available to Trenwick  employees at the  discretion  of the Board of  Directors.
Non-employee  directors receive automatic grants under a separate plan. Exercise
prices are  generally  fixed at the market  value at the date of grant.  Options
vest and are  exercisable  on various  terms,  usually  either  over a five year
period or up to a ten year  period.  All  options  have an  expiration  date not
exceeding ten years.  Total authorized common stock reserved for future issuance
under all stock benefit plans at December 31, 1999 is 1,827,527 shares.



                                       47

<PAGE>

Transactions  under  the  stock  option  plans  during  1999,  1998 and 1997 are
summarized as follows:

                                       1999             1998              1997
                                    --------          -------           --------
Number of options
Outstanding, beginning
  of year                            907,210          911,195           981,195
Issued in exchange for
  Chartwell options                1,160,182                -                 -
Granted                              175,960          124,210             8,250
Cancelled                            (46,029)          (6,000)           (1,500)
Exercised                                  -         (122,195)          (76,750)
Outstanding,
  end of year                      2,197,323          907,210           911,195
Exercisable,
  end of year                      1,387,789          210,112           312,807

Average exercise price
Issued in exchange for
  Chartwell options                   $30.57                -                 -
Granted                                28.34           $36.72            $32.88
Cancelled                              29.41            29.70             30.92
Exercised                                  -            12.57             12.46
Outstanding,
  end of year                          29.80            29.07             25.82
Exercisable,
  end of year                          30.30            27.87             21.81

Included in the table above are options granted to certain senior officers under
the 1993 Stock  Option  Plan.  The  exercise  and  vesting of these  options are
accelerated if the price of Trenwick's  common stock achieves certain  specified
levels, subject to certain conditions.

At the time of Trenwick's  acquisition  of Chartwell,  all of the options issued
under Chartwell's stock option plans became fully vested.

At December  31,  1999,  there were  warrants  outstanding  which were issued in
exchange for Chartwell  warrants upon  consummation  of the  acquisition for the
purchase  of 275,989  shares of common  stock at an average  price of $25.45 per
share.

Pro Forma Information

Trenwick   applies  the  provisions   of  Accounting   Principles  Board Opinion
"Accounting  for Stock  Issued to  Employees,"  and related  interpretations  in
accounting for its  stock-based  compensation  plans.  Since stock options under
Trenwick's  plans are  issued  at fair  market  value on the date of  grant,  no
compensation  expense has been  recognized  for these stock options or warrants.
Had Trenwick applied the fair value based method,  net income and net income per
share  would  have been the pro forma  amounts  indicated  below (in  thousands,
except per share data):

                                       1999                1998            1997
                                       ----                ----            ----
Net income (loss)
              As reported          $(11,048)             $34,792         $35,252
              Pro forma             (11,393)              34,850          35,083

Basic earnings (loss) per share
              As reported             $(.94)               $2.99           $3.03
              Pro forma                (.97)                2.97           $3.01





                                       48
<PAGE>

The pro forma adjustments  relate to options granted from 1995 to 1999 for which
a fair value on the date of grant was determined using the Black-Scholes  option
pricing model. No effect has been given to options and warrants granted prior to
1995. Valuation and related assumption information are presented below:


                                           1999             1998            1997
                                           ----             ----            ----
Valuation Assumptions:
     Expected volatility
          Employees                         28%             23%               -
          Non-employee directors            28%             23%             27%
          Non-employee directors
         (former Chartwell)                 27%               -               -
     Risk-free interest rate
          Employees                        6.1%            5.6%               -
          Non-employee directors           6.1%            5.6%            6.1%
          Non-employee directors
         (former Chartwell)                6.1%               -               -
Dividend Yield                             3.0%             3.1%           2.6%

The Black-Scholes option valuation model was developed for use in estimating the
fair  value  of  options  which  have no  vesting  restrictions  and  are  fully
transferable.  In addition,  option valuation models require the input of highly
subjective  assumptions  including the expected stock price volatility.  Because
Trenwick's stock options have characteristics significantly different from those
of traded options,  and because changes in the subjective input  assumptions can
materially affect the fair value estimate, in management's opinion, the existing
models do not necessarily provide a reliable single measure of the fair value of
its stock options.

Restricted Common Stock Awards
Trenwick awards restricted common stock to key employees, under the terms of the
1989 and 1993 Stock  Plans.  In 1999,  65,985  shares were awarded at an average
price of  $29.00  per share  (approximately  $1,914,000),  which  vest over five
years.  Shares  awarded  in 1998 and 1997  vest  over five  years.  Shares  were
repurchased  in 1999,  1998  and 1997 in  connection  with the  satisfaction  of
employees'  withholding  taxes  payable upon the vesting of  previously  awarded
shares. During 1999, 8,369 shares were repurchased at an average price of $31.54
per share (approximately $264,000). Trenwick has recognized compensation expense
of  $982,000,  $770,000  and  $543,000  for 1999,  1998 and 1997,  respectively,
determined  by the  award  value of the  shares  amortized  over the  applicable
vesting period.



                                       49

<PAGE>

Note 11
Comprehensive
Income

The components of accumulated other  comprehensive  income at December 31 are as
follows:
(in thousands)                                           1999            1998
                                                         -----           -----
Unrealized investment
  gains (losses)                                       $(9,464)        $ 39,330
Realized investment gains
  included in net income                                (1,916)          (9,016)
Foreign currency
  translation adjustment                                (3,854)            (552)
Deferred income tax (benefit)
  expense                                                5,509          (10,425)
Accumulated other
  comprehensive income (loss)                          $(9,725)        $ 19,337

The  income  tax  benefit  (expense)  applicable  to  each  component  of  other
comprehensive income are as follows:

(in thousands)                          1999             1998              1997
                                        -----            ----             -----
Unrealized investment
  gains (losses)                     $13,880         $(2,810)           $(3,750)
Realized investment
  gains (losses)
  included in
  net income                             649           3,091               (806)
Foreign currency
  translation
  adjustment                           1,406             197                  -
Income tax benefit
  (expense) applicable
  to other comprehensive
  income (loss)                      $15,935         $   478            $(4,556)








                                       50
<PAGE>

Note 12
Insurance
Regulation

Trenwick America Re, Chartwell  Reinsurance,  INSCORP,  ReCor Insurance  Company
(ReCor)  and Dakota  Specialty  Insurance  Company  (Dakota)  are subject to the
insurance laws and regulations of their respective  domiciliary  state insurance
departments  which were, as of December 31, 1999,  Connecticut,  Minnesota,  New
York, New York and North Dakota,  respectively.  Effective  January 1, 2001, the
Connecticut,  Minnesota,  New York and North Dakota  Insurance  Departments will
adopt the Codification of Statutory  Accounting  Principles (the  Codification).
The Codification provides guidance for areas where statutory accounting has been
silent and changes current  statutory  accounting in some areas. The Company has
not finalized the quantification of the effects of Codification on its statutory
financial statements.

Under the holding company  structure,  Trenwick is dependent upon the ability of
its operating  subsidiaries for the transfer of funds principally in the form of
cash dividends and tax reimbursements.

Under  the  applicable  provisions  of the  insurance  holding  company  laws of
Connecticut,  Minnesota  and  North  Dakota,  insurance  companies  may only pay
dividends without the approval of the applicable state insurance  regulator,  if
such dividends,  together with other dividends paid within the preceding  twelve
months,  are less than the  greater of (i) 10% of the  insurer's  policyholders'
surplus as of the end of the prior calendar year or (ii) the insurer's statutory
net income,  excluding realized capital gains, for the prior calendar year. As a
further restriction, the maximum amount of dividends insurers may pay is limited
to its earned  surplus,  also known as its  unassigned  funds.  Any  dividend in
excess of the amount  determined  pursuant  to the  foregoing  formula  would be
characterized as an "extraordinary dividend" requiring the prior approval of the
state insurance regulator.









                                       51
<PAGE>

Under New York law,  which is  applicable  to  INSCORP  and ReCor,  the  maximum
ordinary dividend payable in any twelve month period without the approval of the
New York Insurance Department is the lesser of (i) 10% of policyholders' surplus
as shown on the  company's  last annual  statement or any more recent  quarterly
statement or (ii) the company's  adjusted net  investment  income.  Adjusted net
investment  income is defined  as net  investment  income for the twelve  months
preceding  the  declaration  of the  dividend  plus the  excess,  if any, of net
investment  income  over  dividends  declared or  distributed  during the period
commencing  thirty-six  months prior to the  declaration or  distribution of the
current  dividend and ending twelve months prior thereto.  In any case, New York
law permits the payment of an ordinary  dividend by an insurer or reinsurer only
out of earned surplus.

In addition to the foregoing limitations,  the New York Insurance Department, as
is its practice in any change of control situation,  required Trenwick to commit
to preclude the acquired New  York-domiciled  insurers,  INSCORP and ReCor, from
paying any dividends for two years after the merger with Chartwell without prior
regulatory approval.  The foregoing restriction will expire on October 27, 2001.
Neither INSCORP nor ReCor paid any dividends in 1997, 1998 or 1999.

In 2000,  of Trenwick's  U.S.  insurance  subsidiaries,  only Dakota could pay a
dividend  or  other  distribution  without  prior  approval  of  the  applicable
insurance  regulatory  authority.  In  2000,  Dakota  could  pay a  dividend  of
$2,800,000 without prior approval.  During 1999, 1998 and 1997, Trenwick America
Re paid dividends of  $53,400,000,  $30,100,000  and  $8,300,000,  respectively.
Chartwell  Reinsurance  paid  dividends of $30,300,000 in 1999 and $3,000,000 in
1997.  Chartwell  Reinsurance  did  not  pay  any  dividends  in  1998.  None of
Trenwick's other U.S. insurance subsidiaries paid any dividends in 1999, 1998 or
1997.

Under the applicable  laws of the United Kingdom,  Trenwick's U.K.  subsidiaries
may  make  distributions  only  from  accumulated   realized  profits,   net  of
accumulated  realized losses. In addition,  under the U.K.  Insurance  Companies
Act, Trenwick International is not permitted to make any distribution that would
reduce its net assets below the required  minimum margin of solvency  which,  as
determined under the U.K. Financial Services Authority's rules, is approximately
$16,700,000 as of December 31, 1999. In addition,  Trenwick  International  must
also notify the U.K.  Financial Services Authority of any proposal to declare or
pay a dividend on any of its share capital. Under Lloyd's regulations, Chartwell
Managing Agents is not permitted to make any  distribution  that would cause its
assets to fall below any of Chartwell  Managing  Agents' share capital,  minimum
net current asset margin or minimum net asset  margin.  As of December 31, 1999,
the highest of the three tests required  Chartwell  Managing  Agents to maintain
approximately $1,100,000 of capital.

Trenwick  Group Inc.'s  reinsurance  and insurance  subsidiaries  file financial
statements prepared in accordance with statutory accounting practices prescribed
or permitted by insurance regulators of their respective state of domicile.

Combined  net  income  and  statutory  surplus  of  Trenwick  Group Inc. were as
follows:

(in thousands)                          1999             1998              1997
                                    ---------         --------           -------
Net income (loss)                   $(53,270)         $ 40,930           $42,797
Statutory surplus                    458,824           330,496                 -






                                       52
<PAGE>

The NAIC's model  risk-based  capital  regulation  (the RBC Model Act)  requires
insurance  companies  to  calculate  and report  information  under a risk-based
capital formula which measures  statutory capital and surplus needs based on the
risks in a company's  mix of business  and  investment  portfolio.  Based on its
calculation as of December 31, 1999, Trenwick America Re, Chartwell Reinsurance,
INSCORP,  ReCor and Dakota each exceeds all of the capital levels  prescribed in
the RBC Model Act.

Note 13
Supplemental
Cash Flows
Information

A  reconciliation  of cash provided by (used for) operations for the three years
ended December 31 is as follows:

(in thousands)                          1999             1998             1997
                                     --------         --------         --------
Net income (loss)                    $(11,048)         $34,792         $ 35,252
Adjustments to reconcile
  net income (loss) to
  net cash provided by
  (used for) operating
  activities
Equity in net earnings
  of investees                           (188)               -                -
Contingent interest                       642                -                -
Amortization of premiums
  on investments, net                   1,832            4,219            2,557
Deferred income taxes                   2,935            1,329            3,224
Net realized investment
  gains                                (1,916)          (9,016)          (2,304)
Depreciation expense                    1,942              998              371
Amortization of debt
  issuance costs                          292              124               32
Extraordinary loss on
  debt redemption                           -                -            1,595
Amortization expense                    1,423                -               -
Other                                   1,013              908              558
Change in assets and
  liabilities, net of
  effects from purchase
  of subsidiary
Premiums in process of
  collection                            8,906            2,543          (29,178)
Deferred policy
  acquisition costs                    (6,655)            (679)            (719)
Current income taxes
  receivable/payable                  (24,748)           1,865           (1,759)
Other assets                              109           (1,270)          (5,268)
Unpaid claims and claims
  expenses, net of
  reinsurance
  recoverable balances                (10,142)          (3,638)          32,621
Unearned premium income,
  net of prepaid
  reinsurance premiums                 27,393            3,552            5,073
Other liabilities                     (44,088)           2,142            4,955
Net cash provided by
  (used for) operating
  activities                         $(52,298)         $37,869         $ 47,010





                                       53
<PAGE>

Note 14
Fair Value of
Financial
Instruments

The fair value of a financial  instrument  is defined as the amount at which the
instrument could be exchanged in a current  transaction between willing parties.
In the event that  quoted  market  prices were not  available,  fair values were
based on estimates using  discounted cash or other valuation  techniques.  Those
techniques are  significantly  affected by the assumptions  used,  including the
discount  rates and  estimates  of the amount and timing of future  cash  flows.
Accrued premiums have estimated payment dates ranging from 1999 to 2003. Premium
payment dates are estimated using the anticipated payout pattern of claims which
result in the additional  premium due from ceding  companies.  The fair value is
estimated  using cash flows  discounted  at an interest  rate of 5%.  These fair
value estimates may vary in the near term.

The following table presents in summary form the carrying  amounts and estimated
fair values of Trenwick's financial instruments at December 31:
<TABLE>
<CAPTION>
(in thousands)                                                      1999                                    1998
                                                                   ------                                  ------
                                                      Carrying                Fair              Carrying             Fair
                                                        Amount               Value                Amount            Value
                                                      ---------             -------             ---------           ------
<S>                                                 <C>                 <C>                     <C>              <C>
Assets
Debt securities                                     $1,311,361          $1,311,361              $893,020         $893,020
Equity securities                                      110,666             110,666                49,188           49,188
Other investments                                       19,446              19,446                     -                -
Investments held by
  managed syndicates                                   137,745             137,745                     -                -
Cash and cash equivalents                              125,954             125,954                63,003           63,003
Cash and cash equivalents held
  by managed syndicates                                 44,687              44,687                     -                -
Accrued premiums                                       279,480             276,474               126,758          124,832
Deposits                                                20,227              20,227                     -                -
Liabilities
6.70% senior notes due 2003                         $   75,000          $   74,153              $ 75,000         $ 78,750
10.25% senior notes due 2004                            39,831              42,778                     -                -
7.67% senior credit facility
  due 2000                                              80,000              81,801                     -                -
6.94% senior credit
  facility due 2000                                     14,501              14,723                     -                -
Contingent interest notes                               34,699              34,699                     -                -
Other long-term debt                                     4,874               4,638                     -                -
Company-obligated   mandatorily   redeemable
  preferred  capital  securities  of subsidiary
  trust holding solely junior subordinated
  debentures of Trenwick Group Inc.                 $  110,000          $   91,982              $110,000         $110,150

</TABLE>



                                       54
<PAGE>

Note 15
Related-Party
Transactions

The Company holds an equity investment in certain managing general agents (MGAs)
through  which it  writes  primary  insurance  business.  Such  investments  are
accounted for under the equity method.  At December 31, 1999, the carrying value
of the  investments  in  Florida  Intracoastal  Underwriters  (25%  owned),  HDR
Insurance  Services (20% owned),  Cambridge Alliance (35% owned) and Inter-Reco,
Inc. (49% owned) were $1,148,000, $654,000, $211,000 and $204,000, respectively.
For the year ended  December  31,  1999,  the  Company  incurred  $6,238,000  of
commission  expense  payable to these MGAs. At December 31, 1999,  the Company's
balance sheet includes  $28,740,000 of agents'  balances  receivable  from these
MGAs  including  installment  premiums  deferred  and not yet due.  The  current
portion of balances due from these MGAs are settled on a monthly basis.


Note 16
Earnings
Per Share

The following table sets forth the computation of basic and diluted earnings per
share:

(in thousands except per share data)         1999           1998           1997
                                          --------       --------       --------
Income (loss) available to
  common stockholders
Income (loss) before extraordinary
  item (basic)                            $(11,048)       $34,792       $36,289
Add interest on
  convertible debentures,
  net of income taxes                            -              -           578
Income (loss) before extraordinary
  item (diluted)                          $(11,048)       $34,792       $36,867
Net income (loss) (basic)                 $(11,048)       $34,792       $35,252
Add interest on convertible debentures
  and loss on debt redemption, net of
  income taxes                                   -              -         1,615
Net income (loss) (diluted)               $(11,048)       $34,792       $36,867
Weighted average shares of common
  stock outstanding
Weighted average shares outstanding
  (basic)                                   11,762         11,657        11,645
Weighted average shares issuable on
  exercise of employee stock options and
  stock warrants net of assumed repurchases      -            122           173
Weighted average shares issuable on
  conversion of debt                             -              -           447
Weighted average shares outstanding
  (diluted)                                 11,762         11,779        12,265
Basic earnings (loss) per  share
Income (loss) before extraordinary item      $(.94)         $2.99         $3.12
Net income (loss)                            $(.94)         $2.99         $3.03
Diluted earnings (loss) per share
Income (loss) before extraordinary item      $(.94)         $2.95         $3.01
Net income (loss)                            $(.94)         $2.95         $3.01





                                       55

<PAGE>

Note 17
Segment
Information

In 1998, Trenwick adopted the accounting standard "Disclosures about Segments of
an Enterprise and Related  Information."  This statement  requires  reporting of
information  utilizing a  management  approach.  This  approach  designates  the
internal  organization that is used by management for making operating decisions
and assessing  performance as the source of the Company's  reportable  segments.
This statement also requires disclosures about products and services, geographic
areas and major  customers.  The adoption of this  statement  did not affect the
results of operations or financial position.

Trenwick has determined that its reportable segments are those that are based on
the Company's  method of internal  reporting,  which  segregates its business by
geographic  location.  Trenwick  has  four  reportable  business  segments:  (1)
Trenwick   America  Re,  (2)  Canterbury   Financial  Group  Inc.  (3)  Trenwick
International and (4) CMA. Trenwick America Re underwrites treaty reinsurance of
property and  casualty  risks  primarily  written by U.S.  insurance  companies.
Trenwick America Re includes reinsurance  business of Chartwell  Reinsurance and
its subsidiaries since its acquisition on October 27, 1999. Canterbury Financial
Group   underwrites   specialty   insurance  in  the  United  States.   Trenwick
International   provides   specialty   insurance  and  treaty  and   facultative
reinsurance on a world-wide basis. CMA manages  Trenwick's  participation in the
Lloyd's market.













                                       56
<PAGE>

The summary  financial  results for Trenwick's  operating  segments for the year
ended December 31, are as follows:

<TABLE>
<CAPTION>
(in thousands)                                                                    1999              1998             1997
                                                                                --------          --------         --------
<S>                                          <C>                               <C>               <C>               <C>
Net premiums earned                                 Trenwick America Re         $166,906          $174,443         $190,156
                                             Canterbury Financial Group           10,343                 -                -
                                                 Trenwick International          107,911            71,118                -
                                              Chartwell Managing Agents           39,954                 -                -
                                                                                 325,114           245,561          190,156
Net investment                                      Trenwick America Re           49,315            44,490           43,692
  income                                     Canterbury Financial Group            1,722                 -                -
                                                 Trenwick International           11,253            10,614                -
                                              Chartwell Managing Agents            3,845                 -                -
                                                            Unallocated              259             1,212            4,710
                                                                                  66,394            56,316           48,402
Net realized                                        Trenwick America Re              962             6,444            2,304
  investment gains                           Canterbury Financial Group                8                 -                -
  (losses)                                       Trenwick International            1,098             1,794                -
                                              Chartwell Managing Agents             (152)                 -               -
                                                            Unallocated                -               778                -
                                                                                   1,916             9,016            2,304
Total revenues                                      Trenwick America Re          217,322           225,351          236,162
                                             Canterbury Financial Group           12,234                 -                -
                                                 Trenwick International          120,028            83,961                -
                                              Chartwell Managing Agents           44,233                 -                -
                                                            Unallocated              468             2,002            4,710
                                                                                 394,285           311,314          240,872
Underwriting                                        Trenwick America Re          (39,118)           (3,167)           6,628
  profit (loss)                              Canterbury Financial Group              974                 -                -
                                                 Trenwick International          (10,946)           (2,432)               -
                                              Chartwell Managing Agents          (13,817)                 -               -
                                                                                 (62,907)           (5,599)           6,628
Interest expense                                    Trenwick America Re              112                 6                -
  and minority                               Canterbury Financial Group               76                 -                -
  interest                                       Trenwick International            4,513             3,434                -
                                              Chartwell Managing Agents                -                 -                -
                                                            Unallocated           14,177            10,216            9,814
                                                                                  18,878            13,656            9,814
Income (loss) before                                Trenwick America Re            4,369            44,320           52,644
  income taxes and                           Canterbury Financial Group            2,659                 -                -
  extraordinary item                             Trenwick International            1,171             6,977                -
                                              Chartwell Managing Agents           (9,537)                 -               -
                                                            Unallocated          (19,882)           (8,260)          (5,114)
                                                                                 (21,220)           43,037           47,530
Income tax (benefit)                                Trenwick America Re           (3,104)            9,644           12,514
  expense                                    Canterbury Financial Group              979                 -                -
                                                 Trenwick International              204             1,341                -
                                              Chartwell Managing Agents           (2,519)                -                -
                                                            Unallocated           (5,732)           (2,740)          (1,273)
                                                                                 (10,172)            8,245           11,241
Income (loss) before                                Trenwick America Re            7,473            34,676           40,130
  extraordinary                              Canterbury Financial Group            1,680                 -                -
  item                                           Trenwick International              967             5,636                -
                                              Chartwell Managing Agents           (7,018)                -                -
                                                            Unallocated          (14,150)           (5,520)          (3,841)
                                                                                 (11,048)           34,792           36,289
Total investments                                   Trenwick America Re        1,209,923           792,868
  and cash                                   Canterbury Financial Group          104,216                 -
                                                 Trenwick International          215,846           211,599
                                              Chartwell Managing Agents          196,313                 -
                                                            Unallocated           23,561               744
                                                                               1,749,859         1,005,211
Total assets                                        Trenwick America Re        1,837,261         1,028,569
                                             Canterbury Financial Group          262,233                 -
                                                 Trenwick International          406,430           353,079
                                              Chartwell Managing Agents          533,455                 -
                                                            Unallocated          201,220            10,613
                                                                               3,240,599         1,392,261
</TABLE>




                                       57

<PAGE>

Brokers and Ceding Companies
During  the  year  ended  December  31,  1999,   Trenwick  America  Re  received
approximately 61% of its gross written premiums from three  reinsurance  brokers
of which AON Reinsurance  Agency accounted for approximately  37%, Guy Carpenter
accounted for  approximately 16% and E.W. Blanch accounted for approximately 8%.
In 1998,  Trenwick  America Re produced  approximately  37%,  10% and 10% of its
gross written premiums from three reinsurance  brokers;  AON Reinsurance Agency,
Peglar and Associates,  Inc. and Willis Faber,  respectively.  In 1997, Trenwick
America Re produced approximately 41%, 14% and 10% of its gross written premiums
from three reinsurance brokers;  AON Reinsurance Agency,  Willis Faber, N.A. and
G.J. Sullivan, respectively.

Two   reinsurance   brokers   accounted  for   approximately   13%  of  Trenwick
International's  1999 gross  written  premiums of which AON  Reinsurance  Agency
accounted for  approximately  8% and Alexander Forbes accounted for 5%. In 1998,
Nelson Hurst and AON Reinsurance  Agency accounted for approximately 15% and 12%
of gross written premiums, respectively.

Trenwick's  concentration of business in the U.S.  reinsurance  market through a
small number of sources is consistent with the concentration of the property and
casualty  broker  reinsurance  market,  in which a majority  of the  business is
written  through  the top  ten  largest  brokers  in the  reinsurance  industry.
Contrary  to  Trenwick  America  Re's  concentration,  Trenwick  International's
business  is  produced  from  a  variety  of  sources  including  insurance  and
reinsurance brokers.

During  the  year  ended  December  31,  1999,   Trenwick  America  Re  received
approximately  26% of its gross written  premiums from three ceding companies of
which Duncanson and Holt accounted for approximately 12%, American International
Group accounted for approximately 7% and CNA Insurance  Companies  accounted for
approximately 7%. In 1998,  Trenwick America Re produced  approximately 16%, 12%
and 10% of its gross written premiums from three ceding companies: Duncanson and
Holt, American  International Group and Fort Washington Holdings,  respectively.
In 1997,  Trenwick  America Re produced  approximately  11%,  11% and 10% of its
gross  written  premiums  from three ceding  companies:  American  International
Group,  Canal  Insurance  Company and  Travelers  Group.  No one ceding  company
accounted for more than 3% of Trenwick  International's gross written premium in
1999 and 1998.

Loss of all or a substantial  portion of the business  provided by these brokers
and ceding  companies  could have a material  adverse effect on the business and
operations  of Trenwick.  Trenwick does not believe,  however,  that the loss of
such  business  would have a  long-term  adverse  effect  because of  Trenwick's
competitive  position  within the  reinsurance  market and the  availability  of
business from other brokers and ceding companies.

Managing  General  Agencies

In 1999,  Canterbury  Financial Group  wrote  approximately  66%  of  its  gross
written premiums through four managing general agents as follows:  HDR Insurance
Services (23%), Florida Intracoastal Underwriters,  Ltd. (19%), Inter-Reco, Inc.
(13%), and Professional  Insurance  Underwriters,  Inc. (11%).  Loss of all or a
substantial  portion of the business provided by these managing general agencies
could have a material adverse effect on the business and operations of Trenwick.








                                       58


<PAGE>

Note 18
Unaudited Quarterly
Financial Data

Summarized unaudited quarterly financial data is as follows:

<TABLE>
<CAPTION>

(in thousands
except per share data)                                             1999             1998              1997
                                                                   -----            ----              ----
<S>                                     <C>                    <C>               <C>               <C>
                                        Quarter ended
Earned premiums                           December 31          $141,467          $63,612           $45,414
                                         September 30            58,608           65,161            43,723
                                              June 30            66,071           70,964            47,105
                                             March 31            58,968           45,824            53,914
Net investment                            December 31            26,207           14,639            12,372
  income                                 September 30            13,047           14,317            12,178
                                              June 30            13,317           14,976            12,123
                                             March 31            13,823           12,384            11,729
Net realized                              December 31            (1,075)           7,572               388
  investment                             September 30               (38)             184                 -
  gains (losses)                              June 30               523              540                 1
                                             March 31             2,506              720             1,915
Income (loss) before                      December 31            (2,392)          11,329             9,122
  extraordinary                          September 30           (22,426)           5,243             8,773
  item                                        June 30             5,665            8,975             8,593
                                             March 31             8,105            9,245             9,801
Basic income (loss)                       December 31              (.16)            1.03               .77
  before extra-                          September 30             (2.15)             .45               .74
  ordinary item                               June 30               .54              .75               .72
  per share                                  March 31               .75              .78               .90
Diluted income (loss)                     December 31              (.16)            1.02               .75
  before extra-                          September 30             (2.15)             .44               .73
  ordinary item                               June 30               .53              .74               .71
  per share                                  March 31               .74              .77               .81


</TABLE>

Amounts for 1999 reflect the results of Chartwell,  accounted for as a purchase,
from October 27,  1999,  the date of  acquisition.  Amounts for 1998 reflect the
results of Trenwick  International,  accounted for as a purchase,  from February
27, 1998, the date of acquisition. In the quarter ended March 31, 1997, Trenwick
had an extraordinary  loss on debt redemption of $1,037,000,  or $0.09 per basic
share, which was net of a $558,000 income tax benefit.

Note 19
Subsequent
Event

On March 1, 2000,  Chartwell Re Holdings  fully redeemed its 10.25% Senior Notes
due 2004 at a redemption price of 102.56% of par value. The net balance of these
notes as of December 31, 1999 was $40,075,000.







                                       59






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